是的，差不多.List<T>是一个通用类.它支持存储特定类型的值，而无需向object转换或从object转换(在ArrayList情况下，如果T是值类型，则会产生装箱/拆箱开销).ArrayList只存储object个引用.作为一个通用集合，List<T>实现了通用IEnumerable<T>接口，可以在LINQ中轻松使用(无需任何Cast或OfType调用).
ArrayList belongs to the days that C# didn't have generics. It's deprecated in favor of List<T>. You shouldn't use ArrayList in new code that targets .NET >= 2.0 unless you have to interface with an old API that uses it.