using System;

public class Program

{

    public static void Main()

    {

        int[] a =new int[]{10,20,30,45};

        int[] b =new int[]{10,20,6,30,45};

        Console.WriteLine(IsSort(a));

        Console.WriteLine(IsSort(b));

    }

     static bool IsSort(int[] a)

    {

        int x=0;

        for (int i=0 ;i<a.Length-1 ; i++)

        {

            if (a[i]<a[i+1])

            {

                x++;

            }   

        }

        return(x == a.Length-1);

​

    }

}