using System;

using System.Collections;

public class Program

{

    public static void Main()

    {

        var fieldMapping = "1|abc|def|ghi";

        var g = fieldMapping.Split('|');

        int r;

        if (int.TryParse(g[0], out r))

        {

            var t = fieldMapping.Replace("|", "\n");

            fieldMapping = t.Remove(0, t.IndexOf("\n", System.StringComparison.Ordinal));

        }

        Console.WriteLine("Result:");

        Console.WriteLine(fieldMapping);

    }

}