Could not load file or assembly 'AJAXExtensionsToolbox' or one of its dependencies. The parameter is incorrect. (Exception from HRESULT 0x80070057 (E_INVALIDARG))


To solve this issue
1st close your project/website & after close visual studio.
2nd delete folder from Temporary ASP.NET Files
(open run window(press win+r key) & type %temp%
and after press enter).
3rd Open Temporary ASP.NET Files here delete folder of your project/website.
4th After open your project/website & run it.

свернуть