c# Execute UDF scalar in sql server

ExecUDF_scalar.cs

  public T ExecUDF_scalar<T>(string UDFName, string[] ParamNames, object[] ParamValues)
        {
            try
            {
                SqlCommand Comm = new SqlCommand();
                Comm.Connection = MyConnection;
                Comm.CommandText = string.Format("SELECT [dbo].[{0}] ({1}) ", UDFName, string.Join(",",ParamNames));
                Comm.Parameters.Clear();

                for (int i = 0; i < ParamNames.Length; i++)
                    Comm.Parameters.AddWithValue(ParamNames[i], ParamValues[i]);

                DataSet ds = new DataSet();

                MyConnection.Open();
                var result = Comm.ExecuteScalar();

                return (T) Convert.ChangeType(
                    result.ToString() , typeof(T));
            }
            catch (Exception Ex)
            {
                throw Ex;
            }
            finally
            {
                MyConnection.Close();
            }
        }