Insertion Sort in C#

public static class InsertionSort 
{
public static void Sort(int[] arr) 
{
    // Iterate over the array (0..n).
    for(int i = 0; i < arr.Length; i++) 
    {
        int tmp = arr[i];
        int j = i - 1;
        // While j is out of place, iterate backwards.
        while(j >= 0 && arr[j] > tmp) 
        {
            arr[j+1] = arr[j];
            j = j - 1;
        }
        // Assign the correct location of i where j stops. 
        arr[j+1] = tmp;
    }
}
}