Entityframework.docs: Learning problem

[IMAXZ]

When I learned the 'Find' method of 'EntityFramework', I encountered a problem, why the incoming parameter is an array, but the returned result is an entity. When I pass multiple primary keys, this method gives an error, I think this is not reasonable, the parameter should not be an array, why do you want to design this way?

[roji]

The Find method accepts an array because of composite primary keys - multiple values are needed in order to identify a single entity. In other words, a single Find invocation always finds a single entity instance given a single primary key, the latter of which may contain 1 or more values. This is explained in the XML documentation.

[IMAXZ]

oh , Thanks！You solved my doubt.