private void loadServerInstance() { if (isChackInstance) { btnTest.Enabled = false; pnlMain.Enabled = false; this.Cursor = Cursors.AppStarting; var instance = SQLServerHelper.EnumerateServers(); if (instance != null) { cbxServerName.Items.Clear(); cbxServerName.Items.AddRange(instance.ToArray()); isChackInstance = false; } btnTest.Enabled = true; pnlMain.Enabled = true; Cursor = Cursors.Default; } }