Integration Services :: Getting Error While Execute SSIS Package From Console Application

SSIS package working fine directly.I got following error while execute SSIS package from C# console application.

The connection "{79D920D4-9229-46CA-9018-235B711F04D9}" is not found. This error is thrown by Connections collection when the specific connection element is not found.
Cannot find the connection manager with ID "{79D920D4-9229-46CA-9018-235B711F04D9}" in the connection manager collection due to error code 0xC0010009. That connection manager is needed by "OLE DB Destination.Connections[OleDbConnection]" in the connection manager collection of "OLE DB Destination".
Verify that a connection manager in the connection manager collection, Connections, has been created with that ID.
OLE DB Destination failed validation and returned error code 0xC004800B. One or more component failed validation. There were errors during task validation.

Code : 

   public static string RunDTSPackage()
        {
            Package pkg;
            Application app;
            DTSExecResult pkgResults;
            Variables vars;
            app = new Application();
            pkg = app.LoadPackage(@"D:WORKPackage.dtsx", null);
     Microsoft.SqlServer.Dts.Runtime.DTSExecResult results = pkg.Execute();
}

I have recreate the application with again new connection in SSIS. Still not working.

DB : SQL Server 2008 R2