Performance of anonymous types in C#

Question

Is it bad to use anonymous types in C#?

Answer 1

They're like other types, in terms of performance.

edit

To be more clear, I should have said that they perform exactly like other types because they are exactly like other types, except for the fact that the compiler generates the name. The only way performance would suffer is if you pass an instance of the anonymous type to another scope, where reflection or dynamic would have to be used just to access the properties. That would be expensive because it involves late binding to resolve everything at runtime.