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CyberSlag5k

C# - Multi-interface field

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Let's say I have two interfaces, IOne and ITwo, and I want some other class to have a class property that subscribes to both. Is the best approach: 1.
public class MyClass<T> where T : IOne, ITwo
{
   public T MyProperty { get; set; }
}

2.
interface IOneAndTwo : IOne, ITwo
{
}

public class MyClass
{
   public IOneAndTwo MyProperty  { get; set; }
}

3. Something else. I'm not positive that #2 will work, but I think so. The idea is to accomplish something like the following:
public class MyOtherClass : IOne, ITwo
{
// stuff
}

MyClass myClass = new MyClass();
MyOtherClass myOtherClass = new MyOtherClass();
myClass.MyProperty = myOtherClass

Thoughts?

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In plain C#, a class must inherit from both interfaces to be considered an instance that satisfies them. If you want to inherit directly from the interfaces or create a third interface that inherits from the two (and is then used/inherited by others), that's a design choice that depends on the usage.

The generic should work like that too, but again depends on the usage.

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