C# 装箱/拆箱的任何替代品？

Question

My recent code is including a lot of boxing and unboxing , as many of my variables are resolved at runtime. But I've read that boxing and unboxing is very expensive computationally, and so I want to ask if there is any other ways to box/unbox types? And is this even a good practice to use it?

Answer 1

Use Generics ....

More info here

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For example

List lst=new List();//non generic List accepts any kind of object
lst.Add(44);//this causes unnecessary boxing from int to object
lst.Add(100);//this causes unnecessary boxing from int to object

If you are sure that the list will always contain an integer you can use generics..

List<int> lst=new List<int>();
lst.Add(44);//no boxing or unboxing
lst.Add(100);//no boxing or unboxing

Answer 2

In that specific question I could say use the more general type, in that case string and parse it to number if its a number. More general approch is to create custom struct or use tuple with field stating what its the real answer for each case like that , but its quit ugly.