I installed the contour package in the project for learning the features.

I created a .NET user control which implements AJAX Control toolkit. It started giving Error on the Property browsing section.

I uninstalled the contour package. Initially several errors were coming. Fixed them.

And now still the following error is showing on the Property browsing section :-

System.Web.HttpCompileException (0x80004005): c:\windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\7484f2f1\d3fc5b68\App_Web_emailcntrlwithcalloutextndr.ascx.6bb32623.adgydt0r.0.cs(254): error CS0433: The type 'AjaxControlToolkit.ValidatorCalloutExtender' exists in both 'c:\windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\7484f2f1\d3fc5b68\assembly\dl3\475a4eaa\dae9cf9f_7615ce01\AjaxControlToolkit.DLL' and 'c:\windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\7484f2f1\d3fc5b68\assembly\dl3\26846e8f\ecef6b50_7f15ce01\Umbraco.Forms.References.DLL' at System.Web.Compilation.AssemblyBuilder.Compile() at 

I came to a solution for referencing the Umbraco.Forms.References.DLL and which i don't want to. How can i remove all the references of Contour package ?