Encoding an Underscore to %5F

Question

I am trying to use the HttpUtility.HtmlEncode to encode an underscore to %5f, but the encoded value does not give me the hex representation. How will I accomplish this?

string encodedValue = HttpUtility.HtmlEncode("First_Name");

The value I want in the encodedValue string is "First%5FName".

Is there something I am missing? I have also tried using the HttpUtility.UrlEncode, but that does not give me the desired result as well.

I know this should be something simple, but I cant get around it.

Answer 1

if you just want to replace _ with %5f, you can just use myString.Replace("_", "%5f");

Answer 2

It's an old subject but to convert a char in its HexEscape format you should use:

myString.Replace("_", Uri.HexEscape("_"));