Update Detached Entity on Entity Framework 6

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EF6.0

I'm new to Entity Framework and I'm using Mock to test my repository. The repository uses a class that implements DbContext.

When I run the update test on an attached entity, it works fine. When I run the same test on a detached entity, it fails because the changes have not been applied. I looked through other forums where they use AttachTo but i cannot find that method with EF6.

I currently use the method Attach to update it. I even tried other methods below but no success. I need advice on that.

myContext.Set<blog>().Attach(detachedBlog);

Entry<blog>(myBlog).State = EntryState.Modified;

Entry<blog>(existingBlog).CurrentValues.SetValues(detachedBlog);