Hi Ramendra

Have you tried to build a debug version of your service and try to attach to
it?

The reason of crashing could be anything (OutOfMemory, stackoverflow, etcc)
and anywhere (Managed and/or nonmanaged - null pointer exception, gp faul
etc..). Even if you can attach it to the process and the crash happens
randomly, it is still difficult to find out why it is crashing.

I guess you will need to isolate where your program crashes, at managed code
or unmanaged code level. Then perhap it will be easier to go from there. A
good start would be to wrap try and catch in all places that you susspect
the crash might happen.

Do a non-invasive attach, maybe even kernel debug.