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C# Coding Standard

Rule:  12@106

Synopsis:Use List<> instead of ArrayList especially for value types
Severity Level:7

For value types, the List<> is up to 20x faster than the ArrayList. For type string, there is no difference. (This is mainly caused by the fact that the ArrayList, which is a 'left over' from .NET 1.0, is boxing the values and the List<> isn't.) To prevent potential performance problems in this area the recommendation is to ALWAYS use List<>.