.NET Framework support in SharePoint 2010

“SharePoint 2010 does not support access from .NET Framework 4 or being run in a .NET Framework 4 app domain. If you must support the .NET Framework 4, we recommend that you develop a web service that uses the .NET Framework 4 and then connect to it from SharePoint. All server-side customizations directly for SharePoint 2010 still need to be either the .NET Framework 3.5 or the .NET Framework 3.5 SP1.”

ref: http://blogs.msdn.com/b/sharepointdev/archive/2011/07/14/net-framework-support-in-sharepoint-2010.aspx

 

How to enable assembly bind failure logging (FUSION) in .NET

"Add the following values to

HKEY_LOCAL_MACHINESOFTWAREMicrosoftFusion
Add:
DWORD ForceLog set value to 1
DWORD LogFailures set value to 1
DWORD LogResourceBinds set value to 1
String LogPath set value to folder for logs ie) C:FusionLog
Make sure you include the backslash after the folder name."

http://stackoverflow.com/questions/255669/how-to-enable-assembly-bind-failure-logging-fusion-in-net