I imported System.Collections namespace in my class, but I still cant use ArrayList type. The code editor says the "class not found". I am using VS2008 & VS2010.开发者_如何学Python

So has MS stopped support for this type in framworks 3.5 and upwards ?

ArrayList is still supported in .NET 3.5 and .NET 4.0. From MSDN:

ArrayList Class

Implements the IList interface using an array whose size is dynamically increased as required.

Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)

...

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Remember that it's not a generic type so you can't write ArrayList<Foo>. You should use List<T> instead.

Why don't you use a List instead ?

List<myObject> variable = new List<myObject>();

IIRC they haven't but you should really use List<T> in System.Collections.Generic.