DbSet<T> represents a collection of entities of a specific type that can be queried from the database. It provides an abstraction over database tables.
Key features:

• Querying: Supports LINQ queries
• CRUD operations: Add, Remove, Update operations
• Change tracking: Tracks entity states
• Local view: Access to locally tracked entities

// Querying
var products = context.Products.Where(p => p.Price > 100).ToList();
// Adding
context.Products.Add(new Product { Name = "New Product" });
// Removing
context.Products.Remove(product);
// Local entities
var localProducts = context.Products.Local.ToList();