Now, such excpetions are caught by an exception handler and just an error message is shown.
This was the kind of exception causing these fatal server crashes:
APPLICATION EXCEPTION DETECTED: System.UnhandledExceptionEventArgs^M
^M
Exception: System.ArgumentOutOfRangeException: Argument is out of range.
Parameter name: offset exceeds the size of buffer
at System.Net.Sockets.NetworkStream.BeginRead (System.Byte[] buffer, Int32 offset, Int32 size, System.AsyncCallback callback, System.Object state) [0x00000] in <filename unknown>:0
at HttpServer.HttpClientContext.OnReceive (IAsyncResult ar) [0x00000] in <filename unknown>:0 ^M
^M
Application is terminating: True^M