QueryString malformed after URLDecode

Question

I\'m trying to pass in a Base64 string into a C#.Net web application via the QueryString. When the string arrives the \"+\" (plus) sign is being replaced by a space. It appe

Answer 1

If you use System.Uri.UnescapeDataString(yourString) it will ignore the +. This method should only be used in cases like yours where when the string was encoded using some sort of legacy approach either on the client or server.

See this blog post: http://blogs.msdn.com/b/yangxind/archive/2006/11/09/don-t-use-net-system-uri-unescapedatastring-in-url-decoding.aspx