Question

I set up a method to pass a type as a parameter

private void SomeMethod(System.Type type)
    {
        //some stuff
    }

Is there a way to enforce the type so that you can only pass in types that inherit from a specific base class?

Answer 1

there are a lot of possibilities…

instance-based:

private void SomeMethod(object list) // total generic

becomes

private void SomeMethod(IEnumerable<object> list) // enumerable-generic

or

private void SomeMethod(List<object> list) // explicit list

OR with generic functions:

private void SomeMethod<T>() where T : MyType // << contraints
{
    var theType = typeof(T);
}

call that:

var xyz = SomeClass.SomeMethod<string>(); // for example

for more info about constraints:
http://msdn.microsoft.com/en-us/library/d5x73970(v=vs.80).aspx