correctly disposing a parameter

Question

I have a code that up until now had a part like this:

public bool ActionA()
{
    using var dbContext = new MyDbContext();
    ...
}

The using statement disposes of the dbContext var at the end of its usage.

Now I want to change the signature with a DI:

 public bool ActionA(MyDbContext dbContext)
 {
    ...
 }

Is there a way to use the using statement on a parameter to dispose of it at the end of the usage automatically? If not, what is the correct way to dispose it?

Answer 1

Is there a way to use the using statement on a parameter to dispose of it at the end of the usage automatically?

Yes:

public bool ActionA(MyDbContext dbContext)
{
    using (dbContext)
    {
        ...
    }
}

However, this is bad, because the caller may need to use the MyDbContext after ActionA has finished processing, potentially resulting in an ObjectDisposedException.

what is the correct way to dispose it?

For the above reason, you should allow the caller to take responsibility for disposing that object.

DI frameworks will almost certainly take care of object disposal for you.