CODEWITHSUNDEEP
c#genericsreflection
QuantumHive
QuantumHive

Reputation: 5683

Compare open generic parameter with open generic interface type

Is it possible (in c#) to compare an open generic parameter e.g. T in: 

public void CompareMethod<T>() { ... }

with the type of an open generic interface (or class)?
Here is an example interface: 

public interface IExample<T> { }

And then somehow inside the method compare them like this: 

public void CompareMethod<T>()
{
    if (typeof(IExample<>) == typeof(T))
    {
        //execute
    }
}

The if body won't execute when called the method like this: 

CompareMethod<IExample<object>>();

It is important that I don't know in advance what closed types will be entered in the open generic parameter of the CompareMethod.

Upvotes: 1

Views: 487

Answers (1)

Steven
Steven

Reputation: 172646

You need to call GetGenericTypeDefinition() on T to be able to compare it with IExample<>:

public void CompareMethod<T>()
{
    if (typeof(T).IsGenericType && 
        typeof(T).GetGenericTypeDefinition() == typeof(IExample<>)) {
    {
        //execute
    }
}

Upvotes: 2

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