Enable CLR Integration
The common language runtime (CLR) integration feature is off by default in Microsoft SQL Server, and must be enabled in order to use objects that are implemented using CLR integration. To enable CLR integration, use the clr enabled option of the sp_configure stored procedure as shown:
sp_configure 'clr enabled', 1 GO RECONFIGURE GO
You can disable CLR integration by setting the clr enabled option to 0. When you disable CLR integration, SQL Server stops executing all CLR routines and unloads all application domains.
To enable CLR integration, you must have ALTER SETTINGS server level permission, which is implicitly held by members of the sysadmin and serveradmin fixed server roles.
Computers configured with large amounts of memory and a large number of processors may fail to load the CLR integration feature of SQL Server when starting the server. To address this issue, start the server by using the -g memory_to_reserve SQL Server service startup option, and specify a memory value large enough.