How to detect Type of generic property, in other words generic argument, from derived class

GetTypeOfGenericArg.cs

public class Main {
    public Type GetTypeOfGenericArg(Type derivedClassType) {
        var typedMyInterfaceType = derivedClassType.GetInterface(typeof(MyInterface<>).FullName);

        // If derivedClassType is 'MyFoo', typedMyInterfaceType is typeof(MyInterface<Foo>)
        return typedMyInterfaceType.GetGenericArguments()[0];
    }
    
    public Type GetTypeOfGenericArgByPropertyName(Type derivedClassType) {
        var myParamPropertyInfo = derivedClassType.GetProperty(nameof(MyInterface.MyParameter));

        // If derivedClassType is 'MyFoo', myParamPropertyInfo is PropertyInfo of MyFoo.MyParameter
        return myParamPropertyInfo.PropertyType;
    }
}

MyInterface.cs

public interface MyInterface<T> {
    T MyParameter { set; get; }
}

public class Foo {
    public string Bar { set; get; }
}

public class MyFoo : MyInterface<Foo> {
    public Foo MyParameter { set; get; }
}