C#•3y ago

Using instruction

Hi, i would like to know when we are using the instruction "using like this :

using (var context = new BloggingContext())
{
    var blogs = context.Blogs.ToList();
}

using (var context = new BloggingContext())
{
    var blogs = context.Blogs.ToList();
}

does it automatically dispose all the variable inside "blogs" and "context" ?

5 Replies

Thinker•3y ago

It automatically disposes context when execution reaches the closing }. But it won't dispose anything else

yeah, blogs simply goes out of scope and that's it, only context gets disposed of could do using var if you need to dispose of blogs as well

MODiX•3y ago

thinker227#5176

REPL Result: Success

class C : IDisposable {
    public void Dispose() => Console.WriteLine("dispose");
}

using (var c = new C()) {
    Console.WriteLine("in scope");
}

class C : IDisposable {
    public void Dispose() => Console.WriteLine("dispose");
}

using (var c = new C()) {
    Console.WriteLine("in scope");
}

Console Output

in scope
dispose

in scope
dispose

Compile: 621.252ms | Execution: 49.092ms | React with ❌ to remove this embed.

ElioOP•3y ago

Thanks

Unknown User•3y ago

Message Not Public