Commands Not Recognized in Telerik.Zip.Extensions

Updated on Aug 27, 2026

Environment

Product	Installer and VS Extensions/UI for ASP.NET AJAX
Version	Current

Description

I encountered issues with unrecognized commands when using Telerik.Zip.Extensions. The Telerik.Windows.Zip.Extensions namespace and related commands are not functioning after a library update. The problem occurs while refactoring old code, likely due to changes in namespaces in Telerik Document Processing libraries.

Cause

Starting with Q3 2016, Telerik Document Processing libraries transitioned to platform-agnostic namespaces. As a result, Windows was removed from all namespaces. This change affects namespaces such as Telerik.Windows.Zip.Extensions, which is now Telerik.Zip.Extensions. The assembly and NuGet package names remain unchanged, but the namespaces in code have been updated.

Solution

Update the imports and code to reflect the new namespaces and methods.

Steps

1. Replace the old namespaces with the new platform-agnostic namespaces in all affected files:

   Old Namespace	New Namespace
   Telerik.Windows.Zip	Telerik.Zip
   Telerik.Windows.Zip.Extensions	Telerik.Zip.Extensions
   Telerik.Windows.Documents.*	Telerik.Documents.*

2. Example of updated imports:

   vb

   Imports System.IO
   Imports Telerik.Zip
   Imports Telerik.Zip.Extensions

3. Update the code to use the correct methods. For example, use the ExtractToFile method on a ZipArchiveEntry:

   vb

   Using archive As ZipArchive = ZipArchive.Read(str)
       For Each entry As ZipArchiveEntry In archive.Entries
           entry.ExtractToFile(
               Path.Combine(dxftools.TargetFolder, entry.Name),
               True,
               Nothing)
       Next
   End Using

   • ExtractToFile is an extension method for ZipArchiveEntry.
   • Ensure the method is used on an entry object and not on ZipFile.

4. The ExtractToFile method signature:

   vb

   ExtractToFile(
       source As ZipArchiveEntry,
       destinationFileName As String,
       overwrite As Boolean,
       timeout As Nullable(Of TimeSpan))

See Also

• Telerik Document Processing Libraries: Migrating to Platform-Agnostic Namespaces
• Telerik.Zip.Extensions.ZipFile API Reference
• Forum Discussion on ExtractToFile