// C# program to find missing Number 

// using xor 

using System; 

using System.Collections.Generic ; 

public class GFG 

{ 

    // Function to find missing number 

    static int getMissingNo (int []arr, int n) 

    { 

        int maxno= 0;

        for (int i=0 ;i<=arr.Length-1; i++)

        {

                if (arr[i] > maxno)

                {

                    maxno=arr[i];

                }

            }

​

                return maxno;

    } 

    /* driver program to test above function */

    public static void Main() 

    { 

        int []a = {11,2,10}; 

        int miss = getMissingNo(a, a.Length); 

        Console.Write(miss); 

    } 

}