C# Using Activator.CreateInstance

Question

I asked a question yesterday regarding using either reflection or Strategy Pattern for dynamically calling methods.

However, since then I have decided to change the

Answer 1

1. There's no error checking here. Are you absolutely sure that _class will resolve to a valid class? Are you controlling all the possible values or does this string somehow get populated by an end-user?
2. Reflection is generally most costly than avoiding it. Performance issues are proportionate to the number of objects you plan to instantiate this way.
3. Before you run off and use a dependency injection framework read the criticisms of it. =)