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

If you're using .NET Framework (not .NET Core), you can create an extension method to properly format the System.Net.HttpRequestHeader enum:

using System;
using System.Net;
using System.Text;

namespace YourNamespace
{
   public static class HttpRequestHeaderEx
   {
      public static string ToStandardName(this HttpRequestHeader requestHeader)
      {
         string headerName = requestHeader.ToString();

         var headerStandardNameBuilder = new StringBuilder();
         headerStandardNameBuilder.Append(headerName[0]);

         for (int index = 1; index < headerName.Length; index++)
         {
            char character = headerName[index];
            if (char.IsUpper(character))
            {
               headerStandardNameBuilder.Append('-');
            }

            headerStandardNameBuilder.Append(character);
         }

         string headerStandardName = headerStandardNameBuilder.ToString();

         return headerStandardName;
      }
   }
}

Usage:

   var userAgentHeaderName = HttpRequestHeader.UserAgent.ToStandardName();