c# - System.Web.HttpException: 'The remote host closed the connection -

while executing webdavserver.sqlstorage.aspnet , webdavserver.filesystemstorage.aspnet applications, receiving following error:

system.web.httpexception: 'the remote host closed connection. error code 0x800704cd.'

my code follows:

public async task processrequestasync(davcontextbaseasync context, ihierarchyitemasync item)     {         if (item iitemcollectionasync)         {             // in case of requests webdav folders serve web page display              // information server , how use it.              // remember call ensurebeforeresponsewascalledasync here if context implementation             // makes useful things in beforeresponseasync.             await context.ensurebeforeresponsewascalledasync();             ihttpasynchandler page = (ihttpasynchandler)system.web.compilation.buildmanager.createinstancefromvirtualpath(                 "~/mycustomhandlerpage.aspx", typeof(mycustomhandlerpage));              if(type.gettype("mono.runtime") != null)             {                 page.processrequest(httpcontext.current);             }             else             {                 // here call beginprocessrequest instead of processrequest start async page execution , able call registerasynctask if required.                  // call apm method (begin/end) tap method (task/async/await) task.fromasync must used.                 await task.factory.fromasync(page.beginprocessrequest, page.endprocessrequest, httpcontext.current, null);             }         }         else         {             await originalhandler.processrequestasync(context, item);         }     }