Move all negative elements to end in c#

Csharp program for Move all negative elements to end. Here mentioned other language solution.

// Include namespace system
using System;
// Csharp program for
// Move all negative elements at the end of array
public class MyArray
{
	// Display array elements
	public void display(int[] arr, int n)
	{
		for (int i = 0; i < n; i++)
		{
			Console.Write("  " + arr[i]);
		}
		Console.WriteLine();
	}
	// Swap the given array elements
	public void swap(int[] arr, int start, int end)
	{
		var temp = arr[start];
		arr[start] = arr[end];
		arr[end] = temp;
	}
	// Method which is move negative elements
	public void moveNegative(int[] arr, int n)
	{
		// first index
		var i = 0;
		// last index
		var j = n - 1;
		while (i < j)
		{
			if (arr[i] < 0 && arr[j] >= 0)
			{
				// When [i] index are have negative value 
				// And [j] is positive then swapping elements values
				this.swap(arr, i, j);
				// Modified index
				i++;
				j--;
			}
			else if (arr[i] >= 0)
			{
				// When element of [i] is not negative
				i++;
			}
			else
			{
				j--;
			}
		}
	}
	public static void Main()
	{
		var task = new MyArray();
		// Array which are containing positive and negative values
		int[] arr = {
			1 , -1 , 3 , 2 , -7 , -5 , 11 , 6
		};
		var n = arr.Length;
		Console.WriteLine("Before Arrange : ");
		// Before move element
		task.display(arr, n);
		// Move negative elements
		task.moveNegative(arr, n);
		// After arrange
		Console.WriteLine("After Arrange : ");
		// After move element
		task.display(arr, n);
	}
}

Output

Before Arrange :
  1  -1  3  2  -7  -5  11  6
After Arrange :
  1  6  3  2  11  -5  -7  -1