help to convert java code to C#

i was trying to get the C# version of the following java code snippet,

HttpURLConnection connection = (HttpURLConnect开发者_高级运维ion)url.openConnection();
connection.setRequestProperty("Range", "bytes=1024-");

this is what i have so far

 WebRequest request = WebRequest.Create(someUri);
 request.Headers.Add("Range", "bytes=1024-");

but it is not working,what is the right way for me go?

Presumably your URI is HTTP since Java's HttpURLConnection is designed for a HTTP connection. WebRequest is abstract and can handle multiple protocols. However, by specifiying a HttpWebRequest type, you can access HTTP-specific methods. The Range header is protected and you should use AddRange to set the property instead of directly adding it to the Header collection.

HttpWebRequest request = (HttpWebRequest) WebRequest.Create(someUri);
request.AddRange("bytes",1024);

You are setting two different things.

A request property is a value passed to the page.

A header property is a header in the HTTP request. Something like setting the HTTP REFERER (sic).