I could not locate a telephony API implementation in C# (.net) . I  suppose
I can use unmanaged DLLs or COM from C#  but this will mean I will have to
write C# wrappers around TAPI calls. I would rather not rewrite the entire
thing.

how can i find out, whether a given string specifies a Path or a file...
System.IO.File.Exist(UnknownString) does not work for my
application. i exactly need to know if the strng is a path or a file...
But how the h*** can i find it out....

i am about to burst!!! how can i make my string break inside a textbox?
i mean with a control charater like "\n", but it does not work!
i have a string and i must set the wrap manuall, not controled by the
wordwrap property of the textbox. as i alread said: "\n" does not work!

I want to develop p2p (peer-to-peer) communication connection for chat in
.Net (Lang: c# - preferable)
NOTE: if two LAN are behind their own router then also it should work as
yahoo, msn messenger works.

How do I add a reference to an assembly that is registered in the GAC?
I have just signed the assembly with a strong-name and added it into the GAC
and above to reference it from my web page.
However, couldn't find it in the COM folder of the Add Reference option.

I have created a component using VB.NET and trying to register it in the GAC.
To do that I tried to sign my assembly with a strong name and I encountered
2 problems.
Problem 1: