Question

We all know this thing

bool.Parse(Session["foo"].ToString())

How do implement the same PARSE method for some custom class?

So if I have

class MyClass
{

}

It would be possible to do like

MyClass.Parse(Session["foo"])

Answer 1

All you need to do is write a static method called Parse() for your class that takes the String and creates an Instance of MyClass with it.

public class MyClass
{
    public static MyClass Parse(string input)
    {
        if(String.IsNullOrWhiteSpace(input)) throw new ArgumentException(input);

        var instance = new MyClass();

        // Parse the string and populate the MyClass instance

        return instance;
    }
}