Defining interfaces in VB.NET

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The ability to define interfaces has been introduced in Visual Basic .NET. VB6 supported interfaces too, but the way they were defined and used tended to raise the eyebrows of experienced object oriented programmers.

Interfaces have been the base of any object oriented...

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programming languages. VB.NET and C# support multiple interface inheritance -- i.e., we can implement from more then one interface. Interfaces solve many problems associated with code reuse in object-oriented programming.

This code sample explains how to define an interface in VB.NET and how to implement the interface in other classes. There are a few constraints associated with interface; I will discuss those in later articles.