Entity Framework Core Interview Question #3

What is DbContext in EF Core?

EF Core Fundamentals & DbContext Junior Beginner

Quick Interview Answer

DbContext is the central EF Core class that represents a session with the database. It exposes entity sets, tracks entity changes, translates LINQ queries, coordinates database operations, and saves changes.

Detailed Explanation

A DbContext is designed to represent a short-lived unit of work. In ASP.NET Core it is normally registered with a scoped lifetime so each HTTP request receives its own context.

DbContext is not thread-safe and should not be shared concurrently between multiple operations or requests.

Code Example

public class AppDbContext : DbContext
{
    public AppDbContext(DbContextOptions<AppDbContext> options)
        : base(options)
    {
    }

    public DbSet<Product> Products => Set<Product>();
}