Construct a System.Type for a generic interface with known type of T [duplicate]

问题

This question already has answers here:

C# use System.Type as Generic parameter (2 answers)

Closed last year.

PROBLEM DESCRIPTION

I have an interface definition IFoo<TBar> : IFoo and a method CreateFooUsingBarType(Type barType). I need the method to resolve an IFoo<TBar> using a dependency injection tool given a specified System.Type instance that defines TBar. Don't ask how I ended up here. I am stuck within these boundaries.

EXAMPLE

public IFoo CreateFooUsingBarType(Type barType)
{
    var iocScope = GetScope();

    // TODO: Create a System.Type for IFoo<TBar>
    // where TBar is barType. Blarghity blargh.
    var fooType =  (Type)null;

    return iocScope.Resolve(fooType);
}

I've tried mucking around with TypeBuilder but I'm getting the sense that it's overkill for this. Does .NET expose a different API for achieving this?

Thanks in advance.

回答1:

You can use the MakeGenericType method:

var fooType = typeof(IFoo<>).MakeGenericType(barType);

来源：https://stackoverflow.com/questions/49467951/construct-a-system-type-for-a-generic-interface-with-known-type-of-t