Imports System
Imports System.Web
Public Class Program
Public Shared Sub Main()
Dim str As String = "https://www.seek4info.com/search.php?query=c+recursion"
Dim url As String = HttpUtility.UrlEncode(str)
Console.Write(url)
End Sub
End Class
' run:
'
' https%3a%2f%2fwww.seek4info.com%2fsearch.php%3fquery%3dc%2brecursion
'