How can I decode HTML characters in C#?

Question

I have email addresses encoded with HTML character entities. Is there anything in .NET that can convert them to plain strings?

Answer 1

For .net 4.0

Add a reference to System.net.dll to the project with using System.Net; then use the following extensions

// Html encode/decode
    public static string HtmDecode(this string htmlEncodedString)
    {
        if(htmlEncodedString.Length > 0)
        {
            return System.Net.WebUtility.HtmlDecode(htmlEncodedString);
        }
        else
        {
            return htmlEncodedString;
        }
    }

    public static string HtmEncode(this string htmlDecodedString)
    {
        if(htmlDecodedString.Length > 0)
        {
            return System.Net.WebUtility.HtmlEncode(htmlDecodedString);
        }
        else
        {
            return htmlDecodedString;
        }
    }