C# How to check if a class implements generic interface?

Question

How to get generic interface type for an instance ?

Suppose this code:

interface IMyInterface<T>
{
    T MyProperty { get; set; }
}
class MyClass : IMyInterface<int> 
{
    #region IMyInterface<T> Members
    public int MyProperty
    {
        get;
        set;
    }
    #endregion
}


MyClass myClass = new MyClass();

/* returns the interface */
Type[] myinterfaces = myClass.GetType().GetInterfaces();

/* returns null */
Type myinterface = myClass.GetType().GetInterface(typeof(IMyInterface<int>).FullName);

Answer 1

In order to get the generic interface you need to use the Name property instead of the FullName property:

MyClass myClass = new MyClass();
Type myinterface = myClass.GetType()
                          .GetInterface(typeof(IMyInterface<int>).Name);

Assert.That(myinterface, Is.Not.Null);

Answer 2

Use Name instead of FullName

Type myinterface = myClass.GetType().GetInterface(typeof(IMyInterface).Name);