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I don't think this is any clearer than your last post. What are you trying to do?
Your not going to get a useful answer with such a vague question.
Hi,
Your query seems to be a general programming query in C# and not directly related to the AutoCAD API.
You can find several examples by searching the web.
Here is one such post :
http://msdn.microsoft.com/en-us/library/aa168292(v=office.11).aspx
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