Default for generic type? [duplicate]

问题

This question already has answers here:

Is there a reasonable approach to “default” type parameters in C# Generics? (5 answers)

Closed 5 years ago.

Is it possible to do something like

public class PriorityQueue<TValue, TPriority=int> where TPriority : IComparable

(note the =int) ?

Before you suggest it, yes, I know I can just add another line:

public class PriorityQueue<TValue> : PriorityQueue<TValue, int> { }

But I'm wondering if it's possible to do it as a param.

回答1:

No. There is no option for default types on generic types in C#.

Your second example is often the "best" option available, if you need this behavior.

来源：https://stackoverflow.com/questions/2747874/default-for-generic-type