How to access COM assembly from SQL CLR procedure

Question:
How to access COM assembly from SQL CLR procedure

Gabbar:
1. ALTER DATABASE [MyDatabase] Set TRUSTWORTHY ON
2. CREATE ASSEMBLY VSS FROM 'C:\Microsoft.VisualStudio.SourceSafe.Interop.dll'
WITH PERMISSION_SET = UNSAFE
3. Now, in the add reference window, this dll is visible.
4. Build and Deploy from buid menu option

The catch is, there are 3 permission levels for create assembly
1. SAFE - default mode - cannot access extrnal resource (files/folders)
2. EXTRNAL_ACCESS - can access extrnal resource (files/folders) bu not COM dlls.
3. UNSAFE - can do everything in the world including reference to COM dlls.

The naming of these options...SAFE, UNSAFE doesn't convey much.
But that's true for many microsoft things. :o(