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If sorted ascending

Given an array of three integers, write a method that checks if they are sorted in ascending order.
Expected input and output
IfSortedAscending([3, 7, 10])→ true IfSortedAscending([74, 62, 99])→ false 
using System;

namespace CSharpExercises.Exercises.Conditional_statements
{
    class IfSortedAscendingTask
    {
        static bool IfSortedAscending(int[] arr)
        {
            return arr[0] <= arr[1] && arr[1] <= arr[2];
        }

        static void Main(string[] args)
        {
            Console.WriteLine(IfSortedAscending(new int[] { 3, 6, 9 })); // True
            Console.WriteLine(IfSortedAscending(new int[] { 34, 17, 90 })); // False
            Console.WriteLine(IfSortedAscending(new int[] { -50, -24, -1 })); // True
        }
    }
}