C# Application.LoadPackage with Project Level DataSource Connections

Question

I'm trying to use the .NET C# framework to make changes to a number of SSIS 2012 packages.
I am trying to use the LoadPackage method of the Application class to open the package, update a variable, and save the package.
The issue that I'm encountering is that the package contains a reference to an project-level connection.  When I save the change, it saves the change fine, but marks all the external connections as invalid.
connectionManagerID="{B0E1693D-0BCA-4D24-AEFC-97F81E37432C}:external"
becomes
connectionManagerID="{B0E1693D-0BCA-4D24-AEFC-97F81E37432C}:invalid"
I assume this is happening because I only have the one project open and therefore the LoadPackage has no context of the project and it's project-level connections.
Is there a way to give the LoadPackage the context of the available project-level connections so that it doesn't mark all the connections as invalid?  When I save the one valid change that I made?
Here is the code for reference:
// Initialize an Application and Package object
Application app = new Application();
Package package = null;
// Load the package in package object
package = app.LoadPackage(pkgPath, null);
// Update the Variable
String value = package.Variables["TableName"].Value.ToString();
if (value.IndexOf(".") == -1){
package.Variables["TableName"].Value = "tstg." + package.Variables["TableName"].Value;
// Save the package
app.SaveToXml(pkgPath, package, null);
Thanks in advance,
Jason

Answer 1

As far as I know (did not try though) it is a limitation. Means you cannot do that on a single package having the connection shared. I would consider using a configuration instead, also in SSIS 2012 the value can be changed in the Catalog, no need to program
anything.
Arthur My Blog