Best pactices for COM interop in .NET

• When using a 32-bit COM library, make sure your .NET library or application project option Platform Target is set to x86 to indicate it should run as a 32-bit process.
• Try to avoid using interop in autonomous cycles.  Interop calls have a cost which could create performance problems if left unchecked.
  

Discussion: http://sadeveloper.net/forums/t/4798.aspx

CLR Inside Out referece: http://msdn.microsoft.com/en-us/magazine/2009.01.clrinsideout.aspx