hMailServer.Administrator.ucDiagnostics.buttonPerformTests_Click C# (CSharp) Method

        private void buttonPerformTests_Click(object sender, EventArgs e)
        {
            using (WaitCursor cursor = new WaitCursor())
             {
            hMailServer.Diagnostics diagnostics = APICreator.Application.Diagnostics;

            diagnostics.LocalDomainName = comboLocalDomain.Text;
            diagnostics.TestDomainName = textboxTestDomain.Text;

            hMailServer.DiagnosticResults results = diagnostics.PerformTests();

            DisplayResults(results);

            Marshal.ReleaseComObject(results);
            Marshal.ReleaseComObject(diagnostics);
             }

             buttonCopyToClipboard.Enabled = true;
             buttonSaveToFile.Enabled = true;
        }