How do I know when to use keyword 'New'?

[Bullfrog1870]

I still don't understand when to use the keyword New and when not to, when declaring an object.

Example: System.IO.Directory does not require a New keyword to create a variable. However, System.IO.DirectoryInfo does require New for a new variable.

How do I know this? Other than trial-n-error, or asking explicitely, how do I know?

strPath = System.IO.Directory.GetCurrentDirectory()
myDirectory = New System.IO.DirectoryInfo(.....)

Thanks!

 

[chiph]

New is used when you need to create an instance of an object. There are methods on an object that can be called without an instance, called shared (static in C#). This is what you're seeing on the Directory class.

How to know? If the method or property you want to access isnt' marked shared, then you'll need to create an instance with New.

Chip H.


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If you want to get the best response to a question, please read FAQ222-2244 first

 

[TipGiver]

Use the NEW keyword to create a new instance of a class, if and only if there is a (or more) constructors.

 

[ThatRickGuy]

Check this FAQ: faq796-5611

-Rick

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