Are there any constants for the default HTTP headers?

Question

Has Microsoft created a class full of constants for the standard HTTP header names or will I have to write my own?

Answer 1

using System.Net.HttpRequestHeader;
using System.Net.HttpResponseHeader;

public class Example {
  static void Main() {
    Console.WriteLine(HttpRequestHeader.IfModifiedSince.ToHeaderString());
    // If-Modified-Since

    Console.WriteLine(HttpResponseHeader.ContentLength.ToHeaderString());
    // Content-Length
  }
}

static class ExtensionMethods {
  public static string ToHeaderString(this HttpRequestHeader instance)
  {
    return Regex.Replace(instance.ToString(), "(\\B[A-Z])", "-$1");
  }

  public static string ToHeaderString(this HttpResponseHeader instance)
  {
    return Regex.Replace(instance.ToString(), "(\\B[A-Z])", "-$1");
  }
}