Performance between importing an entire namespace and using an alias in C #?

Is there a performance difference between importing an entire namespace or using aliases to import only one class? If so, what's the difference?

Examples:

Importing the entire namespace:

using System.Reflection;

Merge to import only one class:

using BindingFlags = System.Reflection.BindingFlags;

EDIT: Explain a little why your answer is the way it would be very appreciated ... in other words, something more than just a yes / no answer. And, perhaps, something is backed up by some authoritative source?