Most common or vicious mistakes in C# development for experienced C++ programmers

Question

What are the most common or vicious mistakes when experienced C++ programmers develop in C#?

Answer 1

• the difference between struct and class in the two
• the difference between a using alias and a typedef
• when do my objects get collected? how do I destroy them now?
• how big is an int? (it is actually defined in C#)
• where's my linker? (actually, Mono does have a full AOT linker for some scenarios)