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Encode and decode a String in C# with HtmlEncode and HtmlDecode methods

While working some time we need to encode or decode our string that contains HTML.
Here is the example of encoding and decoding the html string:

using System;
using System.Web;
using System.Diagnostics;
using System.Web.UI;

public partial class Default : Page
{
        protected void Page_Load(object sender, EventArgs e)
        {
            String originalValue = "<h1>This is Test Header</h1>";
            String encodedValue = HttpUtility.HtmlEncode(originalValue);
            String decodedValue = HttpUtility.HtmlDecode(encodedValue);
            Debug.WriteLine(originalValue);
            Debug.WriteLine(encodedValue);
            Debug.WriteLine(decodedValue);
        }
}

The output will be:
<h1>This is Test Header</h1>
&lt;h1&gt;This is Test Header&lt;/h1&gt;
<h1>This is Test Header</h1>

If you are using .NET 4.0+ you can also use WebUtility.HtmlEncode  and  WebUtility.HtmlDecode which is available in the System.Net namespace.
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