C# 泛型优化

阅读资料：

https://devblogs.microsoft.com/premier-developer/dissecting-the-new-constraint-in-c-a-perfect-example-of-a-leaky-abstraction/

https://alexandrnikitin.github.io/blog/dotnet-generics-under-the-hood/

文献：https://www.microsoft.com/en-us/research/wp-content/uploads/2001/01/designandimplementationofgenerics.pdf