add a public method to a class in csharp

To add a public method to a class in C#, you need to follow these steps:

1. Define your class with the class keyword.
2. In the body of the class, define your public method using the public keyword.
3. Specify the return type of the method. If the method does not return anything, use the void keyword.
4. Give your method a name using a valid identifier.
5. Add any necessary parameters in parentheses after the method name, separated by commas.
6. Inside the method body, write the code to execute when the method is called.

Here's an example code block that demonstrates how to add a public method called Add to a class called Calculator that takes two int parameters and returns their sum:

main.cs
public class Calculator 
{
    public int Add(int a, int b) 
    {
        return a + b;
    }
}
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8 lines

By making the Add method public, it can be accessed externally from the Calculator class and can be called by other methods or classes in your program. This is an example of encapsulation – by controlling how your class is accessed, you can ensure that it functions correctly and is used appropriately in your code.