Write a program in C# Sharp to print or display the lower triangular of a given matrix

using System;  
public class Exercise26
{  
    public static void Main()
     {
        int i,j,n;
        int[,] arr1 = new int[10,10]; 
       Console.Write("\n\nDisplay the lower triangular of a given matrix :\n");
       Console.Write("----------------------------------------------------\n");  
     Console.Write("Input the size of the square matrix : ");
	 n = Convert.ToInt32(Console.ReadLine());
	 Console.Write("Input elements in the first matrix :\n");
       for(i=0;i<n;i++)
        {
            for(j=0;j<n;j++)
            {
	           Console.Write("element - [{0}],[{1}] : ",i,j);
			   arr1[i,j] = Convert.ToInt32(Console.ReadLine());
            }
        }  
	 Console.Write("The matrix is :\n");
	 for(i=0;i<n;i++)
	 {
	   for(j=0;j<n ;j++)
	     Console.Write("{0}  ",arr1[i,j]);
	    Console.Write("\n");
	 }
   Console.Write("\nSetting zero in lower triangular matrix\n");
   for(i=0;i<n;i++){
      Console.Write("\n");
      for(j=0;j<n;j++)
           if(i<=j)
             Console.Write("{0}  ",arr1[i,j]);
           else
             Console.Write("{0}  ",0);
  }
       Console.Write("\n\n");
	  } 
}