diff --git a/.vs/DeleteFileFolder.git/v16/.suo b/.vs/DeleteFileFolder.git/v16/.suo
index 4245f81..72dd8e0 100644
Binary files a/.vs/DeleteFileFolder.git/v16/.suo and b/.vs/DeleteFileFolder.git/v16/.suo differ
diff --git a/DeleteFileFolder/DeleteFileFolder.cs b/DeleteFileFolder/DeleteFileFolder.cs
index 5e91e71..4ad80c6 100644
--- a/DeleteFileFolder/DeleteFileFolder.cs
+++ b/DeleteFileFolder/DeleteFileFolder.cs
@@ -11,18 +11,20 @@ namespace Eugen.ESystem
 {
     public class DeleteFileFolder
     {
-        #region Version und Copyright
-        // Version und Copyright
-        string dllName = Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase); //Den Programmnamen auslesen
-        string dllVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
+		#region Version und Copyright
+		// Version und Copyright
+		static string dllName = Path.GetFileNameWithoutExtension(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase); //Den Programmnamen auslesen
+		static string dllVersion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
         static object[] attributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(AssemblyCopyrightAttribute), false);
-        string copyright = GenerateCopyright();
-        string icon = Application.StartupPath + "\\Info.bmp";
+		static string copyright = GenerateCopyright();
+		static string icon = Application.StartupPath + "\\Info.bmp";
+
         //Assembly Datum und Zeit
         static DateTime value = AssemblyDateTime();
-        string date = value.ToShortDateString();
-        string time = value.ToLongTimeString();
-        private static DateTime AssemblyDateTime()
+		static string date = value.ToShortDateString();
+		static string time = value.ToLongTimeString();
+
+		private static DateTime AssemblyDateTime()
         {
             var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
             var buildDateTime = new DateTime(2000, 1, 1).Add(new TimeSpan(TimeSpan.TicksPerDay * version.Build + TimeSpan.TicksPerSecond * 2 * version.Revision));
@@ -88,7 +90,7 @@ namespace Eugen.ESystem
         /// </summary>
         public static string Copyright { set; get; }
 
-        private void SetDllInfo()
+        private static void SetDllInfo()
         {
             //Name, Version und Copyright setzen
             DllName = dllName;
@@ -97,6 +99,17 @@ namespace Eugen.ESystem
         }
         #endregion
 
+		/// <summary>
+		/// Constructor (for DLL-Information)
+		/// </summary>
+		static DeleteFileFolder()
+        {
+			SetDllInfo();
+		}
+
+		/// <summary>
+		/// Delete Files in a folder
+		/// </summary>
         public DeleteFileFolder()
         {
             SetDllInfo();
diff --git a/DeleteFileFolder/bin/Debug/hedff.dll b/DeleteFileFolder/bin/Debug/hedff.dll
index bab4a82..4ecf314 100644
Binary files a/DeleteFileFolder/bin/Debug/hedff.dll and b/DeleteFileFolder/bin/Debug/hedff.dll differ
diff --git a/DeleteFileFolder/bin/Debug/hedff.pdb b/DeleteFileFolder/bin/Debug/hedff.pdb
index a5b3d6b..a2424a0 100644
Binary files a/DeleteFileFolder/bin/Debug/hedff.pdb and b/DeleteFileFolder/bin/Debug/hedff.pdb differ
diff --git a/DeleteFileFolder/obj/Debug/DeleteFileFolder.csproj.FileListAbsolute.txt b/DeleteFileFolder/obj/Debug/DeleteFileFolder.csproj.FileListAbsolute.txt
index 474b76c..e28f36e 100644
--- a/DeleteFileFolder/obj/Debug/DeleteFileFolder.csproj.FileListAbsolute.txt
+++ b/DeleteFileFolder/obj/Debug/DeleteFileFolder.csproj.FileListAbsolute.txt
@@ -6,7 +6,6 @@ H:\Programmieren\Git-Repository\VisualStudio\2017\_DLL\DeleteFileFolder.git\Dele
 H:\Programmieren\Git-Repository\VisualStudio\2017\_DLL\DeleteFileFolder.git\DeleteFileFolder\obj\Debug\DeleteFileFolder.pdb
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\bin\Debug\hedff.dll
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\bin\Debug\hedff.pdb
-H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\obj\Debug\DeleteFileFolder.csprojAssemblyReference.cache
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\obj\Debug\DeleteFileFolder.csproj.CoreCompileInputs.cache
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\obj\Debug\hedff.dll
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\DeleteFileFolder\obj\Debug\hedff.pdb
diff --git a/DeleteFileFolder/obj/Debug/DeleteFileFolder.csprojAssemblyReference.cache b/DeleteFileFolder/obj/Debug/DeleteFileFolder.csprojAssemblyReference.cache
deleted file mode 100644
index a93170a..0000000
Binary files a/DeleteFileFolder/obj/Debug/DeleteFileFolder.csprojAssemblyReference.cache and /dev/null differ
diff --git a/DeleteFileFolder/obj/Debug/hedff.dll b/DeleteFileFolder/obj/Debug/hedff.dll
index bab4a82..4ecf314 100644
Binary files a/DeleteFileFolder/obj/Debug/hedff.dll and b/DeleteFileFolder/obj/Debug/hedff.dll differ
diff --git a/DeleteFileFolder/obj/Debug/hedff.pdb b/DeleteFileFolder/obj/Debug/hedff.pdb
index a5b3d6b..a2424a0 100644
Binary files a/DeleteFileFolder/obj/Debug/hedff.pdb and b/DeleteFileFolder/obj/Debug/hedff.pdb differ
diff --git a/Test_DeleteFileFolder/Test_DeleteFileFolder.csproj b/Test_DeleteFileFolder/Test_DeleteFileFolder.csproj
index f3ef853..fdc0579 100644
--- a/Test_DeleteFileFolder/Test_DeleteFileFolder.csproj
+++ b/Test_DeleteFileFolder/Test_DeleteFileFolder.csproj
@@ -33,6 +33,10 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="hedff, Version=1.0.7915.24073, Culture=neutral, processorArchitecture=MSIL">
+      <SpecificVersion>False</SpecificVersion>
+      <HintPath>..\DeleteFileFolder\bin\Debug\hedff.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Xml.Linq" />
@@ -79,11 +83,5 @@
   <ItemGroup>
     <None Include="App.config" />
   </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\DeleteFileFolder\DeleteFileFolder.csproj">
-      <Project>{9e1e89be-2500-4b00-8179-6fced03f07c9}</Project>
-      <Name>DeleteFileFolder</Name>
-    </ProjectReference>
-  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.exe b/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.exe
index ecbf4c5..c01369f 100644
Binary files a/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.exe and b/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.exe differ
diff --git a/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.pdb b/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.pdb
index abca52b..9880711 100644
Binary files a/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.pdb and b/Test_DeleteFileFolder/bin/Debug/Test_DeleteFileFolder.pdb differ
diff --git a/Test_DeleteFileFolder/bin/Debug/hedff.dll b/Test_DeleteFileFolder/bin/Debug/hedff.dll
index bab4a82..4ecf314 100644
Binary files a/Test_DeleteFileFolder/bin/Debug/hedff.dll and b/Test_DeleteFileFolder/bin/Debug/hedff.dll differ
diff --git a/Test_DeleteFileFolder/bin/Debug/hedff.pdb b/Test_DeleteFileFolder/bin/Debug/hedff.pdb
index a5b3d6b..a2424a0 100644
Binary files a/Test_DeleteFileFolder/bin/Debug/hedff.pdb and b/Test_DeleteFileFolder/bin/Debug/hedff.pdb differ
diff --git a/Test_DeleteFileFolder/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache b/Test_DeleteFileFolder/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache
index 06c41b4..a133732 100644
Binary files a/Test_DeleteFileFolder/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache and b/Test_DeleteFileFolder/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache differ
diff --git a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.AssemblyReference.cache b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.AssemblyReference.cache
new file mode 100644
index 0000000..fc9c687
Binary files /dev/null and b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.AssemblyReference.cache differ
diff --git a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.FileListAbsolute.txt b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.FileListAbsolute.txt
index 42e9bee..720fe17 100644
--- a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.FileListAbsolute.txt
+++ b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csproj.FileListAbsolute.txt
@@ -16,7 +16,6 @@ H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\bin\Debug\Test_DeleteFileFolder.pdb
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\bin\Debug\hedff.dll
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\bin\Debug\hedff.pdb
-H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.csprojAssemblyReference.cache
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.Form1.resources
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.Properties.Resources.resources
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.csproj.GenerateResource.cache
@@ -24,3 +23,4 @@ H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.csproj.CopyComplete
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.exe
 H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.pdb
+H:\Programmieren\Git-WorkRepository\VisualStudio\_DLL\DeleteFileFolder.git\Test_DeleteFileFolder\obj\Debug\Test_DeleteFileFolder.csproj.AssemblyReference.cache
diff --git a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csprojAssemblyReference.cache b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csprojAssemblyReference.cache
deleted file mode 100644
index e98e53c..0000000
Binary files a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.csprojAssemblyReference.cache and /dev/null differ
diff --git a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.exe b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.exe
index ecbf4c5..c01369f 100644
Binary files a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.exe and b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.exe differ
diff --git a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.pdb b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.pdb
index abca52b..9880711 100644
Binary files a/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.pdb and b/Test_DeleteFileFolder/obj/Debug/Test_DeleteFileFolder.pdb differ