[ray1234]

i want my base type variable to be assigned a derived type, and then call the new functionality in the dervived on my base type variable, how can i do this.

Ray

 public class baseclass
    {
        

        public void eat()
        {
            Console.WriteLine("eat");
        }
    }

    public class derivedclass : baseclass
    {
        public void sleep()
        {
            Console.WriteLine("sleep");
        }

        public void drink()
        {
            Console.WriteLine("drink");
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            baseclass cl = new baseclass()
            cl.sleep()
            c1.drink()       // i want base variable c1 to have derive functionality. is there  a way i can do this.
            
        }
    }

This post has been edited by ray1234: 06 March 2013 - 11:44 AM

[Ryano121]

Yes look into overriding methods.

Polymorphism (especially the bit about virtual methods and overriding them).

[darek9576]

Your Base Class has no idea about it's children.

[lordofduct]

In the example code 'Ray' instantiates a 'baseclass'. So your object isn't a 'derivedclass', and thusly doesn't have the functionality of 'derivedclass'.

You need it to be a 'derivedclass' first off.