JSON is another format of expressing data, just like XML. But, JSON is very simpler than XML, and tiny than XML.

Here is a simple example for JSON serialization in ASP.NET .

public class SpotFields
{
    public SpotFields()
    {
    }
    public int ID { get; set; }
    public int ProductID { get; set; }
    public int X { get; set; }
    public int Y { get; set; }
 
    public int X2 { get; set; }
    public int Y2 { get; set; }
 
    public int W { get; set; }
    public int H { get; set; }
    public string SKU { get; set; }
    public string Discription { get; set; }
 
    public string ProductName { get; set; }
    public string ImageName { get; set; }
    public string SeoName { get; set; }
}

using System.Web.Script.Serialization;

WebMethod
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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.