How to have comments in IntelliSense for function in Visual Studio?

Question

In Visual Studio and C#, when using a built in function such as ToString(), IntelliSense shows a yellow box explaining what it does.

How can I ha

Answer 1

Define Methods like this and you will get the help you need.

    /// 

    /// Adds two numbers and returns the result
    /// 
    /// first number to add
    /// second number to 
    /// 
    private int Add(int first, int second)
    {
        return first + second;
    }

Screenshot of the code usage