泛型类型的多个地方(Multiple where for generic type)

 我需要指定我的类的泛型类型实现了一个接口，并且也是一个引用类型。 我试了下面的代码片段，但都没有工作 
 
public abstract class MyClass<TMyType> 
   where TMyType : IMyInterface
   where TMyType : class

public abstract class MyClass<TMyType> 
       where TMyType : class, IMyInterface
 
 我无法为类型指定多个where子句，是否可以这样做？ 

I need to specify that a generic type for my class implements an interface, and is also a reference type. I tried both the code snippets below but neither work
 
public abstract class MyClass<TMyType> 
   where TMyType : IMyInterface
   where TMyType : class

public abstract class MyClass<TMyType> 
       where TMyType : class, IMyInterface
 
I'm unable to specify multiple where clauses for a type, is it possible to do this?

原文：https://stackoverflow.com/questions/980418