Why is a boolean 4 bytes in .NET?

Question

Why does a System.Boolean take 4 bytes? It just stores one state, either true or false, which could be stored in less space than 4 bytes.

Answer 1

The first result on a Google search for System.Boolean size told me that it's to do with memory alignment. It's faster to push around a four-byte Int32 than it is to work with individual bytes/bits.