CA2234: Pass System.Uri objects instead of strings
A call is made to a method that has a string parameter whose name contains "uri", "Uri", "urn", "Urn", "url", or "Url"; and the declaring type of the method contains a corresponding method overload that has a System.Uri parameter.
A parameter name is split into tokens based on the camel casing convention, and then each token is checked to see whether it equals "uri", "Uri", "urn", "Urn", "url", or "Url". If there is a match, the parameter is assumed to represent a uniform resource identifier (URI). A string representation of a URI is prone to parsing and encoding errors, and can lead to security vulnerabilities. The Uri class provides these services in a safe and secure manner. When there is a choice between two overloads that differ only regarding the representation of a URI, the user should choose the overload that takes a Uri argument.
To fix a violation of this rule, call the overload that takes the Uri argument.
It is safe to suppress a warning from this rule if the string parameter does not represent a URI.
The following example shows a method, ErrorProne, which violates the rule and a method, SaferWay, which correctly calls the Uri overload.
Imports System Namespace DesignLibrary Class History Friend Sub AddToHistory(uriString As String) End Sub Friend Sub AddToHistory(uriType As Uri) End Sub End Class Public Class Browser Dim uriHistory As New History() Sub ErrorProne() uriHistory.AddToHistory("http://www.adventure-works.com") End Sub Sub SaferWay() Try Dim newUri As New Uri("http://www.adventure-works.com") uriHistory.AddToHistory(newUri) Catch uriException As UriFormatException End Try End Sub End Class End Namespace