Answer Posted / Sachin Bajpai

Abstract classes and interfaces are both used to achieve polymorphism in object-oriented programming, but they have some differences:

1. Method Implementation: Abstract classes can have concrete methods with implementation, whereas interfaces only define method signatures without implementation.
2. Inheritance: A class inherits from one abstract class, but can implement multiple interfaces.
3. Real-time example: Let's consider an example of a shape hierarchy where we have a Shape abstract class and two interfaces IPrintable and IResizable. The Shape abstract class could contain properties like Color and Name, while the IPrintable interface would define a Print() method and IResizable would define Resize() methods.
4. An example implementation might look something like this:

```csharp
public abstract class Shape
{
public string Color { get; set; }
public string Name { get; set; }
}

public interface IPrintable
{
void Print();
}

public interface IResizable
{
void Resize(int newSize);
}

public class Circle : Shape, IPrintable, IResizable
{
public double Radius { get; set; }

public void Print()
{
// Implementation of the print method for the circle shape
}

public void Resize(int newSize)
{
// Implementation of the resize method for the circle shape
}
}
```

What do you mean by query string?

1013

hi .net gurus. plz if any one has dumps on 70-631 and 70-541 on windows sharepoint services kindly mail me.

1714

a web application needs to be created to accept the product name and quantity of a toy from a customer. After the customer has entered the product name the application needs to display the discounted price of the product to the customer (company is offering 35% discount on all products). The application should allow the customer to select the product name from a list box. and also while i'm data binding to a label with custom data binding with some declarations : "The Discounted Price is "+((System.Convert.todouble(lblprodprice.text)*(system.convert.todouble(txtqty.text)) - ((System.convert.todouble(lblprodprice.text)*(system.convert.todouble(txtqty.text)*0.35)). Where i need to give this declaration in asp.net 2.0.

1890