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The validation rules and the error strings are specified only in the class.

Alternatively, you can individually install the prerequisites using the following links: If you're using Visual Studio 2010 instead of Visual Web Developer 2010, install the prerequisites by clicking the following link: Visual Studio 2010 prerequisites. NET MVC encourages you to specify functionality or behavior only once, and then have it be reflected everywhere in an application.

A Visual Web Developer project with C# source code is available to accompany this topic. If you prefer Visual Basic, switch to the Visual Basic version of this tutorial. This reduces the amount of code you need to write and makes the code you do write much easier to maintain. NET MVC and Entity Framework Code First is a great example of the DRY principle in action.

This tutorial will teach you the basics of building an ASP.

NET MVC Web application using Microsoft Visual Web Developer 2010 Express Service Pack 1, which is a free version of Microsoft Visual Studio.

Notice how the form has automatically used a background color to highlight the text boxes that contain invalid data and has emitted an appropriate validation error message next to each one.