The Program in C# Program to Swap two Numbers is given below:

using System;

namespace SwapTwoNumbers
{
    class Program
    {
        static void Main(string[] args)
        {
            
            Console.WriteLine("Hello Codeauri Famuly, Enter the first number and Second number here to Swap their numbers: ");
            Console.WriteLine("Well,enter the first number: ");
            int num1 = Convert.ToInt32(Console.ReadLine());
            
            Console.WriteLine("Similarly,enter the second number: ");
            int num2 = Convert.ToInt32(Console.ReadLine());
            
            Console.WriteLine("This is before swapping: ");
            Console.WriteLine("num1: " + num1 + " num2: " + num2);
            
            int temp = num1;
            num1 = num2;
            num2 = temp;
            
            Console.WriteLine("This is after swapping: ");
            Console.WriteLine("num1: " + num1 + " num2: " + num2);
        }
    }
}

Output:

Hello Codeauri Famuly, Enter the first number and Second number here to find their sum:
Well, enter the first number:
20550226
Similarly,enter the second number:
20560423
Okay, the sum of 20550226 and 20560423 is: 41110649

Pro-Tips💡

Here are the step by step execution of the above program:

1. The code starts by importing the System namespace.
2. The namespace SwapTwoNumbers is created.
3. A class named Program is created within the namespace.
4. A Main method is created within the Program class.
5. The program starts by displaying a message to the user to enter two numbers.
6. The first number entered by the user is stored in the num1 variable after converting it to an integer.
7. The second number entered by the user is stored in the num2 variable after converting it to an integer.
8. The original values of num1 and num2 are displayed.
9. A temporary variable temp is created and is assigned the value of num1.
10. The value of num1 is then updated with the value of num2.
11. The value of num2 is then updated with the value of temp.
12. Finally, the values of num1 and num2 are displayed after swapping.