I\'ve problem with Visual Studio 2012 Ultimate.
I inserted a \"Sql Server Database\", and when I try to \"Add new table\" after a while I get this problem
To solve this problem do the following steps:
Go to VS Tools → Options → Database Tools → Query And Views Designer.
Set "Cancel Long Running Query" after 240 second.
Delete all connections in "SQL server explorer" and "SQL Server Objects Explorer" - (this step is very important).
Reopen VS and recreate your connections.