I have a web application which uses a c libraby. The c librabry is mapped using another c# library.
On running many applications concurrently the c library dll is getting locked
Can anyone tell what could be the problem?

I'm going to assume that your c library is exposed to .NET thru a COM interop wrapper.

The problem is that the COM interaction can not support concurrent operations. What would be involved in porting the c dll over to .NET? That might be one of your few options.

-Peter

i have used a .net warapper for the fucntion. This is actually used to read shapefiles. I have wrapped the shapelib.dll(which contains c function) to my project using another dynamic link library maptools.