Program.cs

using System.Text.Json;
using Microsoft.EntityFrameworkCore;
using StudyEntityFramework.Context;
using StudyEntityFramework.Model;

namespace StudyEntityFramework;

internal static class Program
{
    private static async Task Main(string[] args)
    {
        Console.WriteLine("Hello World!");

        await using var db = new BloggingContext();
        
        // Create
        Console.WriteLine("Inserting a new blog...");
        db.Add(new Blog { Url = "https://devblogs.microsoft.com/dotnet/" });
        await db.SaveChangesAsync();
        
        // Read
        Console.WriteLine("First blog in the database:");
        var blog = await db.Blogs.OrderBy(b => b.BlogId).FirstAsync();
        Console.WriteLine(JsonSerializer.Serialize(blog));
        
        // Update
        Console.WriteLine("Updating the blog and adding a post...");
        blog.Url = "https://devblogs.microsoft.com/dotnet/category/ef-core/";
        blog.Posts.AddRange([new Post
        {
            Title = "Testing EF Core", 
            Content = "Using EF Core in .NET"
        },new Post
        {
            Title = "Testing New Post", 
            Content = "With new content"
        }]);
        await db.SaveChangesAsync();
        Console.WriteLine("Updated blog:");
        Console.WriteLine(JsonSerializer.Serialize(blog));
        
        // Delete
        Console.WriteLine("Deleting the blog...");
        db.Remove(blog);
        await db.SaveChangesAsync();
        
    }
}