Entity Framework: Difference between DbSet.Find() and DbSet.FirstOrDefault()

The DbSet.Find() method is used to find an entity in the context by its primary key. It directly accesses the context's cache of entities without hitting the database if the entity is already loaded.

On the other hand, the DbSet.FirstOrDefault() method is used to retrieve the first entity that matches the specified condition from the database. It executes a query against the database to find the entity, and if no entity is found, it returns null.

Therefore, the main difference between DbSet.Find() and DbSet.FirstOrDefault() is that the former searches for an entity in the context's cache based on the primary key, while the latter queries the database to find the entity based on a specified condition.