Solving 2 ASP.Net Run-Time Errors

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Sys.Extended is undefined

Firefox Web Developer Toolbar shows the error

Sys.Extended is undefined

If you click Information, View JavaScript, browse through the code and you may find the section for a JavaScript file called

http://localhost/myapp/somefile.aspx?_TSM_HiddenField_=ctl00_ScriptManager1_HiddenField
&_TSM_CombinedScripts_=3b%3bAjaxControlToolkit%2c+Version%3d3.5.40412.0
%2c+Culture%3dneutral%2c+PublicKeyToken%3d28f01b0e84b6d53e%3ade-DE
%3a065e08c0-e2d1-42ff-9483-e5c14441b311%3ade1feab2%3af2c8e708%3a720a52bf%3af9cec9bc%3a4a2c8239

(your codes may differ), containing an error message from ASP.Net that a directory cannot be found.

Solution: add the missing directory, even if it is empty.

Could not load type ‘System.Web.UI.ScriptReferenceBase’

The browser displays the error message:

Error Message: Could not load type ‘System.Web.UI.ScriptReferenceBase’ from assembly ‘System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’.

Der Typ “System.Web.UI.ScriptReferenceBase” in der Assembly “System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35” konnte nicht geladen werden.

Solution: Install .Net Framework 3.5 Service Pack 1

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