These are just a few steps, as the latest reCAPTCHA library has all the pieces you need for asp.net MVC:

Step 1 – Create Your ReCAPTCHA Account
Go to the ReCAPTCHA site and sign up for your keys. You will get a private key and and a public key.

Step 2 – Download the .Net Library for ReCAPTCHA
Get reCAPTCHA Library and add this to your ASP.NET MVC project as a reference.
Step 3 – Create Action Filter and handle the Captcha validation
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Microsoft recommends developing ASP.NET web applications in an isolated development environment. For more information on the various kinds of development environments, read the chapter ASP.NET Web Application Development Models from the article Team Development with Visual Studio .NET .

ASP.NET has introduced its five updated versions with new added features in each version.

• It was first commenced to web world with version 1.0 in 2002 with Visual Studio .NET,
• In 2003 version 1.1 with Windows Server 2003 and Visual Studio .NET 2003,
• In 2005 version 2.0 with Visual Studio 2005, Visual Web Developer Express and SQL Server 2005,
• In 2007 version 3.5 released with Windows Server 2008 and Visual Studio 2008,
• In 2008 version 3.5 service pack released with Visual Studio 2008 Service Pack 1

ASP.NET allows developers for web application development to use fully featured languages like VB.NET and C# (C-Sharp). Feature of “web services” is unique by ASP.NET, class library, XML support and complete compatibility with other programming languages.

Skipjack Come explore the many features that make Skipjack Transaction Network the leading payment gateway in North America.
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Linq IN query will pull back a set of results from SQL that is within a given range. This range can be set manually, or can itself be a query. So if you have an eCommerce application and you want to know what products you have in a given user’s cart

SQL

SELECT * FROM Product WHERE ProductID IN (SELECT ProductID FROM mycart)

Linq

List<int> itemQuery = new List<int>() {1,2,3,4};

var myProducts = from p in db.Products
                where itemQuery.Contains(p.ProductID)
                select p;

Linq To Sql only constructs the query when the Enumerator is tripped

This article recently which I thought was pretty cool. It describes how to build and use an ASP.NET Server Control that makes Google Map integration easy within ASP.NET applications: