>I just found an interesting quote in a coding guidelines documents:
>
>"Remove the Visual Basic reference from your project. Making use of the original Visual Basic functions has been proven to be up to 1000 times slower than the .NET counterparts; you have been warned."
>
>Do you agree with this quote?
>
>Do you have proof of that?

That's like saying that Fords are proven to be 1000 times slower than Hondas, there's no context. It could well be that there are methods in there that are 1000 times slower than their FCL counterparts but that doesn't mean you should throw the whole assembly away.

Personally I tend to use the FCL methods but that's because I code as much in C# as I do in VB so it comes more naturally. With that said there's nothing wrong with using the code in Microsoft.VisualBasic, and quite often the methods in there provide more functionality than what the framework has to offer or provide functionality that's missing from the framework altogether.

I hope this helps,