UriBuilder.Query
.net, uribuilder
Solution
According to a comment on the MSDN docs for that class, this bug appears if you set the query property more than once.
Having just looked in a decompiler, the setter of Query always prepends a leading `?` if the value being set is not empty.
Problem
I found a strange behavior UriBuilder in .NET Senario 1: ``` Dim uri As New UriBuilder("http://www.test/login.aspx") uri.Query = "?test=Test" Dim url As String = uri.ToString() ``` After this code is run the url string contains "http://www.test/login.aspx??test=Test" Solution was to not add the ?. Senario 2: ``` Dim uri As New UriBuilder("http://www.test/login.aspx?test=123") uri.Query += "&abc=Test" Dim url As String = uri.ToString() ``` After that code is run we yet again have two ? "http://www.test:80/login.aspx??test=123&abc=Test". So am I doing some thing wrong when using the uri builder?