System.Data.Common.DbCommand.ExecuteScalar C# (CSharp) Метод

        public abstract object ExecuteScalar();

 // execute a select command, return single result as a string
 public static string ExecuteScalar(DbCommand command)
 {
     string result = "";
     command.Connection.Open();
     result = command.ExecuteScalar().ToString();
     return result;
 }