diff --git a/src/c#/GeneralUpdate.Zip/GeneralUpdate.Zip.nuspec b/src/c#/GeneralUpdate.Zip/GeneralUpdate.Zip.nuspec
deleted file mode 100644
index f7762d5e..00000000
--- a/src/c#/GeneralUpdate.Zip/GeneralUpdate.Zip.nuspec
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0"?>
-<package >
-  <metadata>
-    <id>$id$</id>
-    <version>$version$</version>
-    <title>$title$</title>
-    <authors>$author$</authors>
-    <owners>$author$</owners>
-    <license type="expression">MIT</license>
-    <projectUrl>https://github.com/WELL-E/AutoUpdater.git</projectUrl>
-    <iconUrl>https://raw.githubusercontent.com/NuGet/Samples/master/PackageIconNuspecExample/icon.png</iconUrl>
-    <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <description>$description$</description>
-    <releaseNotes>Decompress the compressed file with progress notification.</releaseNotes>
-    <copyright>Copyright 2021</copyright>
-    <tags>zip</tags>
-  </metadata>
-</package >
\ No newline at end of file
diff --git a/src/c#/GeneralUpdate.Zip/GeneralZipFactory.cs b/src/c#/GeneralUpdate.Zip/GeneralZipFactory.cs
index 521d391a..2edf7525 100644
--- a/src/c#/GeneralUpdate.Zip/GeneralZipFactory.cs
+++ b/src/c#/GeneralUpdate.Zip/GeneralZipFactory.cs
@@ -83,13 +83,13 @@ private void OnCompressProgress(object sender, BaseCompressProgressEventArgs e)
 
         public IFactory CreateZip()
         {
-            _operation.CreateZip();
+            _operation?.CreateZip();
             return this;
         }
 
         public IFactory UnZip()
         {
-            _operation.UnZip();
+            _operation?.UnZip();
             return this;
         }
     }
diff --git a/src/c#/GeneralUpdate.Zip/nuget.exe b/src/c#/GeneralUpdate.Zip/nuget.exe
deleted file mode 100644
index 3ae0060a..00000000
Binary files a/src/c#/GeneralUpdate.Zip/nuget.exe and /dev/null differ