ASP.NET/C#/VB: Convert Header Management Code from VB to C#

I get this error:

The files /App_Code/customheader.cs and /App_Code/customfunctions.vb use a different language, which is not allowed since they need to be compiled together.

When using this code:

using System.Web;
using System.IO;
namespace org.header_hack
{
    public class RemoveETagModule : IHttpModule
    { 
	public void Dispose() { } 
	public void Init(HttpApplication context)
        {
			context.PreSendRequestHeaders += OnPreSendRequestHeaders;
			context.PreRequestHandlerExecute += new EventHandler(OnPreRequestHandlerExecute);
        } 
        void OnPreSendRequestHeaders(object sender, EventArgs e)
        {
			HttpContext.Current.Response.Headers.Remove("ETag");
			HttpContext.Current.Response.Headers.Remove("Vary");

        }
	public void OnPreRequestHandlerExecute (Object source, EventArgs e)
	{
			String url = HttpContext.Current.Request.FilePath.ToString();			
			String ext = Path.GetExtension(url);
	}
    }
}

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How can my code be changed into VB code to avoid this problem?