Facing Problem in Socket Programming with C# .Net

Hi,

I have a server application and receiving data very speedy from different clients (Round about 300), I have build application using Socket Programming with C# .Net. The basic functionality of server application just receive data and store in database as it is. But there are some error occurred and due to these error my application CRASH. Errors are mentioned below:

1.
OnClientConnect
SocketException Info : Message [An existing connection was forcibly closed by the remote host]. StackTrace [ at System.Net.Sockets.Socket.EndAccept(Byte[]& buffer, Int32& bytesTransferred, IAsyncResult asyncResult)
at System.Net.Sockets.Socket.EndAccept(IAsyncResult asyncResult)
at SH.Tracking.ServerApp.frmGPRSServer.OnClientConnect(IAsyncResult asyn) in ServerApp\frmServer.cs:line 124]

2.
OnClientConnect
SocketException Info : Message [Cannot access a disposed object.
Object name: 'System.Net.Sockets.Socket'.]. StackTrace [ at System.Net.Sockets.Socket.Shutdown(SocketShutdown how)
at SH.Tracking.ServerApp.frmGPRSServer.CloseClientSocket(Socket objSocket) in ServerApp\frmSServer.cs:line 211]

3.
OnClientConnect
Exception Info : Message [Collection was modified; enumeration operation may not execute.]. StackTrace [ at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at System.Linq.Enumerable.WhereListIterator`1.MoveNext()
at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source)
at SH.Tracking.ServerApp.frmGPRSServer.OnClientConnect(IAsyncResult asyn) in ServerApp\frmSServer.cs:line 135]

4.
WaitForData
SocketException Info : Message [An existing connection was forcibly closed by the remote host]. StackTrace [ at System.Net.Sockets.Socket.BeginReceive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
at SH.Tracking.ServerApp.frmGPRSServer.WaitForData(Socket objsoc, Int32 intClientNumber) in ServerApp\frmSServer.cs:line 242]

I am so worried, Please share your valueable comments to get rid of these errors.

Thanks & Regards;
MIA