Getting Error while Execute SSIS Package from Console Application

Question

Dear All,
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:\WORK\Package.dtsx", null);
     Microsoft.SqlServer.Dts.Runtime.DTSExecResult results = pkg.Execute();
I have recreate the application with again new connection in SSIS.
Still not working, Please provide solution if any one have.
DB : SQL Server 2008 R2
Thanks and regards,
Hardik Ramwani

Answer 1

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.
Are you sure that you are running the same package via .NET which works fine from Visual Studio?
By reading error message, I can say that you have copied OLEDB task from another package OR you have deleted one OLEDB connection manager. Now when package is run this task tries to use the connection manager and not found thus throws error message.
Open all OLEDB destination tasks and you find connection manager missing. Connection Manager name should be provided there
Cheers,
Vaibhav Chaudhari
MCSA - SQL Server 2012