Gets or sets the base URI for requests made by a WebClient.
Assembly: System.Net (in System.Net.dll)
is set to an invalid URI. The inner exception may contain information that will help you locate the error.
The property contains a base URI that is combined with a relative address. When you call a method that uploads or downloads data, the WebClient object combines this base URI with the relative address you specify in the method call. If you specify an absolute URI, WebClient does not use the property value. To remove a previously set value, set to null or an empty string ("").