If you encounter problem while creating new project in VS2012 , follow steps given below:

Error: C#2012 compiler could not be created

Solution 1:
Check the following settings:

Tools->Options->Text Editor->C#->General->Auto list members

Tools->Options->Text Editor->C#->General->Parameter information

Also check

Tools->Options->Text Editor->C#->Intelligence->

Show completion list after a character is typed


Tools –> Import and Export Settings -> Reset all Settings


Instead of changing it for only C#, change it for all the languages

Tools > Options > Text Editor > All Languages

Solution 2:

Run following command on VS2012 x86 Native Tools Command Prompt

gacutil /u Microsoft.VisualStudio.CSharp.Services.Language.Interop

If you are unable to delete the assembly, follow steps given in