Upgrading target framework of multiple solutions

public void ChangeFramework()
{
    //Add Reference to envdte (Assemblies\Extensions\envDTE)


    string SolutionFile = @"C:\MyProject\MyProject.sln";
    string ProjectName = "MyProject";


    //------------------------------------------------------------------------
    //Find the Program ID from the registry for VisualStudio.DTE
    //Look it up In Registry: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes

    System.Type oType = System.Type.GetTypeFromProgID("VisualStudio.DTE", true);
    EnvDTE.DTE dte = (EnvDTE.DTE)Activator.CreateInstance(oType, true);


    //------------------------------------------------------------------------
    //Open your Solution
    dte.Solution.Open(SolutionFile);



    //------------------------------------------------------------------------
    //Now In your solution go through what is listed in dte.Solution.Projects and find the one that match what you want to change target for

    int iItemsCount = dte.Solution.Projects.Count;
    string sCurrent = "";

    for (int i = 1; i <= iItemsCount; i++)
    {

        sCurrent = dte.Solution.Projects.Item(i).Name;

        if (dte.Solution.Projects.Item(i).Name == ProjectName)
        {
            //Once you find your project, Change the Framework
            EnvDTE.Project oProject = dte.Solution.Projects.Item(i);
            oProject.Properties.Item("TargetFrameworkMoniker").Value = ".NETFramework,Version = v4.6.2";
        }
    }


    //------------------------------------------------------------------------

    //Close your Solution
    dte.Solution.Close();



}