Move all the negative elements to one side of the array in C#

Solution 1:

/ C# program to move all negative numbers to the
// beginning and all positive numbers to the end with
// constant extra space
using System;
using System.Collections;
public class Gfg {
    
    public static void Main()
    {
        int[] arr = { -1, 2, -3, 4, 5, 6, -7, 8, 9 };
        Array.Sort(arr);

        foreach (int e in arr)
            Console.Write(e + " ");
    }
}
// This code is contributed by Saurabh Jaiswal

Output

-7 -3 -1 2 4 5 6 8 9  

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