commit 69308264836239635732fbe2c43122f546cb3c39
Author: Eugen Höglinger <eugen@hoeglinger.name>
Date:   Wed Feb 26 15:15:19 2020 +0100

    Projekt neu angelegt.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5a5f80a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,32 @@
+
+#Ignore thumbnails created by Windows
+Thumbs.db
+#Ignore files built by Visual Studio
+*.obj
+*.exe
+*.pdb
+*.user
+*.aps
+*.pch
+*.vspscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.cache
+*.ilk
+*.log
+[Bb]in
+[Dd]ebug*/
+*.lib
+*.sbr
+obj/
+[Rr]elease*/
+_ReSharper*/
+[Tt]est[Rr]esult*
+.vs/
+#Nuget packages folder
+packages/
diff --git a/Daten/Excel.zip b/Daten/Excel.zip
new file mode 100644
index 0000000..7be32ba
Binary files /dev/null and b/Daten/Excel.zip differ
diff --git a/Excel/Excel.csproj b/Excel/Excel.csproj
new file mode 100644
index 0000000..39b4622
--- /dev/null
+++ b/Excel/Excel.csproj
@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}</ProjectGuid>
+    <OutputType>WinExe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>CSV20.Excel</RootNamespace>
+    <AssemblyName>Excel</AssemblyName>
+    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Deployment" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Form1.Designer.cs">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </Compile>
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <EmbeddedResource Include="Form1.resx">
+      <DependentUpon>Form1.cs</DependentUpon>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+      <SubType>Designer</SubType>
+    </EmbeddedResource>
+    <Compile Include="Properties\Resources.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+      <DesignTime>True</DesignTime>
+    </Compile>
+    <None Include="Properties\Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
+    <Compile Include="Properties\Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Settings.settings</DependentUpon>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <COMReference Include="Microsoft.Office.Core">
+      <Guid>{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}</Guid>
+      <VersionMajor>2</VersionMajor>
+      <VersionMinor>7</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>primary</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+    <COMReference Include="Microsoft.Office.Interop.Excel">
+      <Guid>{00020813-0000-0000-C000-000000000046}</Guid>
+      <VersionMajor>1</VersionMajor>
+      <VersionMinor>8</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>primary</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+    <COMReference Include="VBIDE">
+      <Guid>{0002E157-0000-0000-C000-000000000046}</Guid>
+      <VersionMajor>5</VersionMajor>
+      <VersionMinor>3</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>primary</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>
\ No newline at end of file
diff --git a/Excel/Excel.sln b/Excel/Excel.sln
new file mode 100644
index 0000000..b291d03
--- /dev/null
+++ b/Excel/Excel.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.572
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Excel", "Excel.csproj", "{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6CD3DB7C-2EEF-489D-AA5D-FF9E2382EF08}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {B75E968F-90F4-4B98-BAF1-B4CC7A40C2B5}
+	EndGlobalSection
+EndGlobal
diff --git a/Excel/Form1.Designer.cs b/Excel/Form1.Designer.cs
new file mode 100644
index 0000000..36ac7ea
--- /dev/null
+++ b/Excel/Form1.Designer.cs
@@ -0,0 +1,92 @@
+namespace CSV20.Excel
+{
+    partial class Form1
+    {
+        /// <summary>
+        /// Erforderliche Designervariable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Verwendete Ressourcen bereinigen.
+        /// </summary>
+        /// <param name="disposing">True, wenn verwaltete Ressourcen gelöscht werden sollen; andernfalls False.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Vom Windows Form-Designer generierter Code
+
+        /// <summary>
+        /// Erforderliche Methode für die Designerunterstützung.
+        /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.buttonSpeichern = new System.Windows.Forms.Button();
+            this.dataGridViewExcel = new System.Windows.Forms.DataGridView();
+            this.openFileDialogExcel = new System.Windows.Forms.OpenFileDialog();
+            ((System.ComponentModel.ISupportInitialize)(this.dataGridViewExcel)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // buttonSpeichern
+            // 
+            this.buttonSpeichern.Dock = System.Windows.Forms.DockStyle.Bottom;
+            this.buttonSpeichern.Font = new System.Drawing.Font("Microsoft Sans Serif", 7.8F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
+            this.buttonSpeichern.Location = new System.Drawing.Point(0, 428);
+            this.buttonSpeichern.Name = "buttonSpeichern";
+            this.buttonSpeichern.Size = new System.Drawing.Size(782, 25);
+            this.buttonSpeichern.TabIndex = 0;
+            this.buttonSpeichern.Text = "Änderungen speichern";
+            this.buttonSpeichern.UseVisualStyleBackColor = true;
+            this.buttonSpeichern.Click += new System.EventHandler(this.buttonSpeichern_Click);
+            // 
+            // dataGridViewExcel
+            // 
+            this.dataGridViewExcel.AllowUserToAddRows = false;
+            this.dataGridViewExcel.AllowUserToDeleteRows = false;
+            this.dataGridViewExcel.AllowUserToResizeRows = false;
+            this.dataGridViewExcel.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            this.dataGridViewExcel.Dock = System.Windows.Forms.DockStyle.Fill;
+            this.dataGridViewExcel.Location = new System.Drawing.Point(0, 0);
+            this.dataGridViewExcel.Name = "dataGridViewExcel";
+            this.dataGridViewExcel.RowTemplate.Height = 24;
+            this.dataGridViewExcel.Size = new System.Drawing.Size(782, 428);
+            this.dataGridViewExcel.TabIndex = 1;
+            // 
+            // openFileDialogExcel
+            // 
+            this.openFileDialogExcel.DefaultExt = "xlsx";
+            this.openFileDialogExcel.Filter = "Excel 2003 (*.xls)|*.xls|Excel 2007 (*.xlsx)|*.xlsx";
+            this.openFileDialogExcel.FilterIndex = 2;
+            // 
+            // Form1
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(782, 453);
+            this.Controls.Add(this.dataGridViewExcel);
+            this.Controls.Add(this.buttonSpeichern);
+            this.Name = "Form1";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
+            this.Text = "Excel Datenblatt";
+            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
+            this.Load += new System.EventHandler(this.Form1_Load);
+            ((System.ComponentModel.ISupportInitialize)(this.dataGridViewExcel)).EndInit();
+            this.ResumeLayout(false);
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Button buttonSpeichern;
+        private System.Windows.Forms.DataGridView dataGridViewExcel;
+        private System.Windows.Forms.OpenFileDialog openFileDialogExcel;
+    }
+}
+
diff --git a/Excel/Form1.cs b/Excel/Form1.cs
new file mode 100644
index 0000000..5775627
--- /dev/null
+++ b/Excel/Form1.cs
@@ -0,0 +1,107 @@
+/*************************************\
+ *     Excel-Dokumente lesen und     *
+ *             bearbeiten            *
+ *                                   *
+ * Kapitel: Erweiterte               *
+ *           Programmierthemen       *
+ * Zuordnung: C#-Buch V2.0 14.2      *
+ *                                   *
+ *  Copyright 2015 by Benjamin Jung  *
+\*************************************/
+using System;
+using System.Windows.Forms;
+using Microsoft.Office.Interop.Excel;   // zusätzlich ist der Projektverweis auf COM -> Microsoft Excel xx-Objectlibrary
+
+namespace CSV20.Excel
+{
+    public partial class Form1 : Form
+    {
+        // oExcelApp benötigt den kompletten Namensraum, da andernfalls der Compiler den Unterschied zwischen 
+        //  "Microsoft.Office.Interop.Excel.Application" und "System.Windows.Forms.Application" nicht erkennen kann
+        private Microsoft.Office.Interop.Excel.Application oExcelApp = new Microsoft.Office.Interop.Excel.Application();
+        private Workbook oWorkbook = null;
+        private Worksheet oWorksheet = null;
+
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+            Range oRange;
+            string sSpaltenName;
+            object oValue;
+
+            if (openFileDialogExcel.ShowDialog() == System.Windows.Forms.DialogResult.OK)
+            {
+                // Datei öffnen und aktives Blatt und benutzten Bereich auswählen
+                oWorkbook = oExcelApp.Workbooks.Open(openFileDialogExcel.FileName);
+                oWorksheet = (Worksheet)oWorkbook.ActiveSheet;
+                oRange = oWorksheet.UsedRange;
+
+                // Zellen vom Dokument in die Ansicht laden
+                for (int i = 0; i < oRange.Columns.Count; i++)
+                {
+                    if (i >= dataGridViewExcel.Columns.Count)
+                    {
+                        // bilden der Spalten-Namen: A, B, C, D, E, ..., A1, B1, C1, ..., A2, B2, ...
+                        sSpaltenName = ((char)('A' + i % 26)).ToString();
+                        if (Math.Floor(i / 26.0) != 0)
+                            sSpaltenName += Math.Floor(i / 26.0).ToString();
+                        dataGridViewExcel.Columns.Add(sSpaltenName, sSpaltenName);
+                    }
+
+                    for (int j = 0; j < oRange.Rows.Count; j++)
+                    {
+                        // Zeilen werden nur beim 1. Durchlauf hinzugefügt
+                        if (i == 0)
+                        {
+                            dataGridViewExcel.Rows.Add();
+                        }
+                        oValue = (oRange.Cells[j + 1, i + 1] as Range).Value;
+                        // muss unbedingt abgefangen werden
+                        if (oValue != null)
+                        {
+                            dataGridViewExcel.Rows[j].Cells[i].Value = oValue.ToString();
+                        }
+                    }
+                }
+
+                // Fenster minimieren und danach wieder in normale Fenstergröße zurückkehren,
+                // dies ist ein Trick, sodass wir die Anwendung wieder in den Vordergrund bekommen,
+                // da Excel unsichtbar geöffnet wird
+                this.WindowState = FormWindowState.Minimized;
+                this.WindowState = FormWindowState.Normal;
+            }
+            else // Bei Abbruch, Fenster schließen
+            {
+                Close();
+            }
+        }
+
+        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            // Beim Schließen des Fensters, Dokument schließen
+            if (oWorkbook != null)
+                oWorkbook.Close(); 
+        }
+
+        private void buttonSpeichern_Click(object sender, EventArgs e)
+        {
+            if (MessageBox.Show("Sind Sie sicher dass Sie die Änderungen übernehmen möchten?\nDie Quelldatei wird überschrieben!", "Speichern?", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
+            {
+                // Daten von der Ansicht in das Dokument schreiben
+                for (int i = 0; i < dataGridViewExcel.Rows.Count - 1; i++)
+                    for (int j = 0; j < dataGridViewExcel.Columns.Count; j++)
+                        if (dataGridViewExcel.Rows[i].Cells[j].Value != null)
+                            (oWorksheet.Cells[i + 1, j + 1] as Range).Value = dataGridViewExcel.Rows[i].Cells[j].Value.ToString();
+                        else
+                            (oWorksheet.Cells[i + 1, j + 1] as Range).Value = "";
+
+                // Speichervorgang auslösen
+                oWorkbook.Save();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Excel/Form1.resx b/Excel/Form1.resx
new file mode 100644
index 0000000..29d0f4a
--- /dev/null
+++ b/Excel/Form1.resx
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="openFileDialogExcel.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+</root>
\ No newline at end of file
diff --git a/Excel/Program.cs b/Excel/Program.cs
new file mode 100644
index 0000000..9faaceb
--- /dev/null
+++ b/Excel/Program.cs
@@ -0,0 +1,29 @@
+/*************************************\
+ *     Excel-Dokumente lesen und     *
+ *             bearbeiten            *
+ *                                   *
+ * Kapitel: Erweiterte               *
+ *           Programmierthemen       *
+ * Zuordnung: C#-Buch V2.0 14.2      *
+ *                                   *
+ *  Copyright 2015 by Benjamin Jung  *
+\*************************************/
+using System;
+using System.Windows.Forms;
+
+namespace CSV20.Excel
+{
+    static class Program
+    {
+        /// <summary>
+        /// Der Haupteinstiegspunkt für die Anwendung.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new Form1());
+        }
+    }
+}
\ No newline at end of file
diff --git a/Excel/Properties/AssemblyInfo.cs b/Excel/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..b304415
--- /dev/null
+++ b/Excel/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// Allgemeine Informationen über eine Assembly werden über die folgenden 
+// Attribute gesteuert. Ändern Sie diese Attributwerte, um die Informationen zu ändern,
+// die mit einer Assembly verknüpft sind.
+[assembly: AssemblyTitle("Excel")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Excel")]
+[assembly: AssemblyCopyright("Copyright ©  2015")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Durch Festlegen von ComVisible auf "false" werden die Typen in dieser Assembly unsichtbar 
+// für COM-Komponenten.  Wenn Sie auf einen Typ in dieser Assembly von 
+// COM zugreifen müssen, legen Sie das ComVisible-Attribut für diesen Typ auf "true" fest.
+[assembly: ComVisible(false)]
+
+// Die folgende GUID bestimmt die ID der Typbibliothek, wenn dieses Projekt für COM verfügbar gemacht wird
+[assembly: Guid("5e6b7c01-e7a8-4cf7-b36f-ff6a23ec141e")]
+
+// Versionsinformationen für eine Assembly bestehen aus den folgenden vier Werten:
+//
+//      Hauptversion
+//      Nebenversion 
+//      Buildnummer
+//      Revision
+//
+// Sie können alle Werte angeben oder die standardmäßigen Build- und Revisionsnummern 
+// übernehmen, indem Sie "*" eingeben:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/Excel/Properties/Resources.Designer.cs b/Excel/Properties/Resources.Designer.cs
new file mode 100644
index 0000000..7bd6840
--- /dev/null
+++ b/Excel/Properties/Resources.Designer.cs
@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Dieser Code wurde von einem Tool generiert.
+//     Laufzeitversion:4.0.30319.34209
+//
+//     Änderungen an dieser Datei können falsches Verhalten verursachen und gehen verloren, wenn
+//     der Code erneut generiert wird.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace CSV20.Excel.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   Eine stark typisierte Ressourcenklasse zum Suchen von lokalisierten Zeichenfolgen usw.
+    /// </summary>
+    // Diese Klasse wurde von der StronglyTypedResourceBuilder automatisch generiert
+    // -Klasse über ein Tool wie ResGen oder Visual Studio automatisch generiert.
+    // Um einen Member hinzuzufügen oder zu entfernen, bearbeiten Sie die .ResX-Datei und führen dann ResGen
+    // mit der /str-Option erneut aus, oder Sie erstellen Ihr VS-Projekt neu.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Gibt die zwischengespeicherte ResourceManager-Instanz zurück, die von dieser Klasse verwendet wird.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("CSV20.Excel.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Überschreibt die CurrentUICulture-Eigenschaft des aktuellen Threads für alle
+        ///   Ressourcenzuordnungen, die diese stark typisierte Ressourcenklasse verwenden.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+    }
+}
diff --git a/Excel/Properties/Resources.resx b/Excel/Properties/Resources.resx
new file mode 100644
index 0000000..af7dbeb
--- /dev/null
+++ b/Excel/Properties/Resources.resx
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/Excel/Properties/Settings.Designer.cs b/Excel/Properties/Settings.Designer.cs
new file mode 100644
index 0000000..231d67c
--- /dev/null
+++ b/Excel/Properties/Settings.Designer.cs
@@ -0,0 +1,26 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Dieser Code wurde von einem Tool generiert.
+//     Laufzeitversion:4.0.30319.34209
+//
+//     Änderungen an dieser Datei können falsches Verhalten verursachen und gehen verloren, wenn
+//     der Code erneut generiert wird.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace CSV20.Excel.Properties {
+    
+    
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "12.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
+        
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+        
+        public static Settings Default {
+            get {
+                return defaultInstance;
+            }
+        }
+    }
+}
diff --git a/Excel/Properties/Settings.settings b/Excel/Properties/Settings.settings
new file mode 100644
index 0000000..3964565
--- /dev/null
+++ b/Excel/Properties/Settings.settings
@@ -0,0 +1,7 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)">
+  <Profiles>
+    <Profile Name="(Default)" />
+  </Profiles>
+  <Settings />
+</SettingsFile>