c# - Replace item in querystring

Question

I have a URL that also might have a query string part, the query string might be empty or have multiple items.

I want to replace one of the items in the query string or add it if the item doesn't already exists.

I have an URI object with the complete URL.

My first idea was to use regex and some string magic, that should do it.

But it seems a bit shaky, perhaps the framework has some query string builder class?

Answer 1

I found this was a more elegant solution

var qs = HttpUtility.ParseQueryString(Request.QueryString.ToString());
qs.Set("item", newItemValue);
Console.WriteLine(qs.ToString());