ConfigurationManager::ConfigurationRowNames Property

public void CodeExample(DTE2 dte, AddIn addin)
{   // Make sure you have a solution loaded into Visual Studio
    // before running the following example.
    try
    {
        ConfigurationManager configmgr;
        Array arrayCRN;
        if (dte.Solution.Projects.Count > 0)
        {
            configmgr = dte.Solution.Projects.Item(1).ConfigurationManager;
            // Show all defined configuration names for the parent 
            // object of this Configuration Manager.
            arrayCRN = (Array)configmgr.ConfigurationRowNames;
            string cfnames = "Configuration Row Names: \n";
            foreach (string n in arrayCRN)
                cfnames = cfnames + n + "\n";
            MessageBox.Show(cfnames);
        }
    }
    catch(Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}