Even with the CREATE ASSEMBLY statement you can install or regsiter your .Net assembly inside SQL Server 2005 but can not register more then one version of same assembly, it means I can have two versions in database at the same time but during registration process can't differentiate with the versions with SQLCLR in SQL Server 2005, so I have to drop one and then I can only install/register the other. 

Lets see in the upcoming posts about the solution.

Stay tune...