C# : C# ile comboboxa sql server instanceları listeleme

DataTable dt = SqlDataSourceEnumerator.Instance.GetDataSources();            foreach (DataRow serverRow in dt.Rows)            {                if (serverRow[dt.Columns["InstanceName"]].ToString() == "")                {                    comboBox1.Items.Add(serverRow[dt.Columns["ServerName"]].ToString());                }                else                {                    comboBox1.Items.Add(serverRow[dt.Columns["ServerName"]].ToString() + "\\" +                                        (serverRow[dt.Columns["InstanceName"]].ToString()));                }            }