C# Example

In this example, we create a class called Calculator and include a method that performs addition. Explanations are also added for each section:

1. Using System
   
   • Adds the System library, which is necessary to use basic system functions in C#. For example, it allows you to use the Console class to get console output.
2. Calculator Class
   
   • Created to perform mathematical operations.
   • Add Method:
     
     • public int Add(int a, int b) takes two integer (int) parameters and adds them.
     • return a + b; returns the sum of the variables a and b.
3. Program Class
   
   • Main Method:
     
     • This is where the program starts running. It is considered the starting point of a program in C#.
     • Calculator calculator = new Calculator(); creates an object of the Calculator class.
     • The expression int result = calculator.Add(5, 3); calls the Add method to calculate the sum of 5 and 3 and assigns the result to the result variable.
     • Console.WriteLine($“Result: {result}”); prints the calculated result to the console. The $ sign allows us to print the variable directly by string interpolation.

This example shows the process of creating a class in C#, defining methods and using those methods to perform a simple calculation.