Member Avatar for virendra_sharma

Hi Frnz ,

i am getting the error while i tried to add ajax control toolkit to .net framework. i have added ajaxcontrol toolkit to bin folder on webapplication .

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Dani AI

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Short guide: the message "is not a .NET framework module" usually means the file you are trying to use is not a managed CLR assembly (it may be native, corrupted, blocked by Windows, or built for a different target). Since already copied the toolkit DLL into the web app bin, run a few quick checks and fixes before trying other downloads.

First, confirm the DLL is a managed assembly and not corrupted. From a Developer Command Prompt try:

corflags AjaxControlToolkit.dll

or

ildasm AjaxControlToolkit.dll

If corflags/ildasm fails with an error that the file is not a valid .NET assembly, the DLL you have is not a managed build (or it is corrupted). If ildasm shows a manifest, the file is managed.

Common fixes

  • Right‑click the DLL -> Properties -> click Unblock if present (Windows will block downloaded files).
  • Make sure the assembly you use is compiled for the same target framework as the project (Project Properties -> Target framework). If your project uses the Client Profile, switch to the full framework when required.
  • Prefer adding the toolkit by reference (References -> Add Reference -> Browse) or via NuGet so you get the correct build for your Visual Studio/.NET version:
    Install-Package AjaxControlToolkit
  • If you only downloaded source, open the toolkit solution and build it for your target framework, then reference the built DLL.

Extra diagnostics

  • If Visual Studio still complains when adding a reference, re-download the binary (or rebuild) to rule out corruption. Use dumpbin /headers AjaxControlToolkit.dll to check PE headers if needed. At runtime, use the Assembly Binding Log Viewer (Fuslogvw) to trace binding failures.

If the problem persists, include the exact Visual Studio error text, the output of corflags/ildasm, your project target framework, and Visual Studio version for further troubleshooting.

Member Avatar for virendra_sharma

try with AjaxControlToolkit.Binary.NET35.zip from

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