Rotate Image

Solution.cs

using System;

public class Solution {
  public void Rotate(int[][] matrix) {

    for(int i = 0; i < matrix.Length/2; i++)
    {
      for(int j = i; j < matrix[i].Length - 1 - i; j++)
      {        
        int b = matrix[j][matrix[i].Length-1-i];
        matrix[j][matrix[i].Length-1-i] = matrix[i][j];
        
        int b2 = matrix[matrix.Length-1-i][matrix[i].Length-1-j];
        matrix[matrix.Length-1-i][matrix[i].Length-1-j] = b;
        
        int b3 = matrix[matrix.Length-1-j][i];
        matrix[matrix.Length-1-j][i] = b2;
        
        matrix[i][j] = b3;
      }
    }

  }
}