c＃类型推断

Question

I have an ECMContext class that inherits from DbContext. Within ECMContext there is a property MlaArticles which is DbSet<MlaArticle> where MlaArticle is inherited from WebObject . I have created a generic method that accepts an argument of type WebObject. The method tries to save changes to the db and if not, backs out the changes.

My question - since I already have db (which was already instantiated) and I know the type of WebObject that is being passed ( MlaArticle in this example), is there a way to refer to the DbSet collection db.MlaArticles without passing an extra argument? I know this is wrong but this exemplifies my question...

protected ECMContext db;

void SaveChanges<T>(T obj) where T : WebObject 
{
    try { db.SaveChanges(); }
    catch
    {
        db.MlaArticles.Remove(obj); //this is the original code
        db.DbSet<T>.Remove(obj); //something like this is what I'd like to do
    }
}

Answer 1

Can you use the Set<T>() operation:

try { db.SaveChanges(); }
catch
{
    db.Set<T>().Remove(obj);
}

?