Junior From PDF EF Core Entity Framework Core

What is lazy loading?

Q: What is lazy loading?

Short answer: re proxies? Lazy loading delays the loading of related data until it's accessed for the first time. EF Core requires proxies for lazy loading: Install NuGet: Microsoft.EntityFrameworkCore.Proxies Enable in OnConfiguring or AddDbContext: options.UseLazyLoadingProxies(); Mark navigation properties as virtual: public virtual ICollection … Posts { get;…… set;… } EF creates runtime proxies to override navigation… Real-world example (ShopNest) Loading orders with items uses .Include(o => o.Items) . Without Include, listing 50 orders can trigger 50 extra queries (N+1). Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: re proxies? Lazy loading delays the loading of related data until it's accessed for the first time. EF Core requires proxies for lazy loading: Install NuGet: Microsoft.EntityFrameworkCore.Proxies Enable in OnConfiguring or AddDbContext: options.UseLazyLoadingProxies(); Mark navigation properties as virtual: public virtual ICollection<Post>… Posts { get;…… set;… } EF creates runtime proxies to override navigation…

Real-world example (ShopNest)

Loading orders with items uses .Include(o => o.Items). Without Include, listing 50 orders can trigger 50 extra queries (N+1).

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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