Why are entity framework entities partial classes?

Question

I recently began using entity framework, and I noticed that generated entities are partial classes. What are the uses of that? I googled a bit and people mostly speak of validat

Answer 1

For the same reason partial classes typically exist at all, code generation.

When code is generated; you don't want your additional methods/properties/whatever blown away, so the designers mark such classes partial to allow users to put additional code in a different file.

In Code-First, the code-generation aspect of EF has largely become obsolete so any EF model classes you create do not need partial.