Connection Issue from CRM

Dear All,

There is  a process which update/insert almost Service request on daily basis. We have used C# to integrate with CRM.

Process creates a single session to connect with CRM and make updates to CRM using this session.

Some times on update/search we receive below error:

   System.Net.WebException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.

   at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)

   at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)

   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)