title: COM Interop, RPC server is unavailable in c#
body: <p>I am using a COM Interop and i am instantiating the COM class object from the interop dll
  So, few times the object is instantiated successfully and make remote procedure calls without any problem but sometimes it throws an exception like RPC Server is unavilable.
  The COM Component i am using is written in VB and i am consuming that component in c#.</p>
  
  <p><strong>So, can anybody tell me the possible reasons for the problem(RPC Server is Unavailable) and solutions to this problem.</strong></p>
  
  <p>I am helpless with this issue by now.</p>
  
  <p>So, Advance thanks if you can help me out</p>