Execution of user code in the .NET Framework is disabled. Enable "clr enabled" configuration option.

While running a project I got this error:
Execution of user code in the .NET Framework is disabled. Enable "clr enabled" configuration option.
Execution of user code in the .NET Framework inside the database is disabled.
Execute this TSQL:  "sp_configure 'clr enabled',1" and "RECONFIGURE"
So to fix this run this TSQL inside the database.
sp_configure 'clr enabled',1
GO
RECONFIGURE