Break loops in C# using while statement : i am writing a c# program that prints 'true'if number <=20 and false if number > 20 using while loop but the program keeps on executing. 
i want to break the program if it reaches certain number e.g. number > 26
please help me to solve the issue.

The code for the program is:
public static void Main()
        {

            Console.WriteLine("Please enter a number");
            int numnber = Convert.ToInt32(Console.ReadLine());

            while (numnber <= 20)
            {
                Console.WriteLine("True");
                Console.ReadLine();
                int number1 = numnber++;

                while (numnber > 20)
                {
                    Console.WriteLine("False");
                    Console.ReadLine();
                }
                
            }