什么做大于/小于签署（例如行动 <List<X> &gt;）在C＃中意味着什么？

Question

example:

public event Action<List<WKSProfile>> WorkstationProfileChanged;

I have trouble understanding the the above member. Does it imply that it returns :

Action<List<WKSProfile>>

Answer 1

This is the syntax to specify generic type parameters .

In a generic type or method definition, a type parameters is a placeholder for a specific type that a client specifies when they instantiate a variable of the generic type. A generic class, such as GenericList<T> listed in Introduction to Generics (C# Programming Guide), cannot be used as-is because it is not really a type; it is more like a blueprint for a type. To use GenericList<T> , client code must declare and instantiate a constructed type by specifying a type argument inside the angle brackets.