umg

ArreglosMultidimensionales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;



namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Ingrese un numero");
            int length = Convert.ToInt32(Console.ReadLine());
            int longitud = 5;
            int[,] MatrizIdentidad = new int[longitud, longitud];
            for(int x = 0; x < longitud; x++) 
            {
                for (int y = 0; y < longitud; y++ )
                {
                    if (x == y)
                    {
                        Console.Write(" 1 ");
                        MatrizIdentidad[x,y] = 1;
                    }
                    else
                    {
                        Console.Write(" 0 ");
                        MatrizIdentidad[x,y] = 0;
                    }
                }
                Console.WriteLine("");
            }
            Console.WriteLine("");

            String[][] jaggedArray = new String[3][]; 
            jaggedArray[0] = new String [] {"a", "b"};
            jaggedArray[1] = new String [] {"c", "d", "e", "f"};
            jaggedArray[2] = new String [] {"g", "h", "i", "j", "k", "l"};

            foreach (String[] x in jaggedArray)
            {
                foreach (String y in x)
                {
                    Console.Write(" {0} ", y);
                }
                Console.WriteLine("");
            } 

            Console.ReadLine();
        }
    }
}

MultiplicationTable.cs

using System;
using System.Text;
using System.IO;

class MainClass {
  public static void Main (string[] args) {
    MultiplicationTable FiveTable = new MultiplicationTable(5);
    FiveTable.switchBy("while");
    FiveTable.ifBy("while");
  }
}

public class MultiplicationTable {
  private int number;
  public MultiplicationTable(int num) {
    number = num;
  }

  public void byFor () {
    Console.WriteLine ("Tabla hecha con un `for`\n");
    for (int x = 1; x < 11; x++) {
      this.printStep(x);
    }
  }

  public void byWhile () {
    Console.WriteLine ("Tabla hecha con un `while`\n");
    int x = 1;
    while (x < 11) {
      this.printStep(x);
      x++;
    }
  }

  public void byDoWhile () {
    Console.WriteLine ("Tabla hecha con un `do while`\n");
    int x = 1;
    do {
      this.printStep(x);
      x++;
    } while (x < 10);
  }

  public void switchBy(string type) {
    Console.WriteLine ("Tipo elegido con un `switch`");
    switch (type) {
      case "for":
        this.byFor();
        break;
      case "doWhile":
        this.byDoWhile();
        break;
      case "while":
        this.byWhile();
        break;
    }
  }

  public void ifBy(string type) {
    Console.WriteLine ("Tipo elegido con un `if's` y `else's`");
    if (type == "for") {
      this.byFor();
    } else if (type == "doWhile") {
      this.byDoWhile();
    } else if (type == "while") {
      this.byWhile();
    }
  }

  private void printStep (int step) {
    Console.WriteLine(number + "\tx\t" + step + "\t=\t" + this.getStep(step));
  }

  private int getStep (int step) {
    return step * number;
  }

}