How to mark a entity as changed

Question

say I've a entity class user. Now in that class, I want to do:

partial class user{
    public void save()
    {
       using (ent e = new ent())
       {
           var res = (from u in e.user where u.name == name select u).first();
           res = someOtherUserObject;
           context.SaveChanges();
       }
    }
}

• Q1: Is this possible ?
• Q2: Is it possible to retrive a entity and marking as if it is changed without actually changing it?

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The question may have been already answered but I could not find the link.

Answer 1

Q2: Is it possible to retrive a entity and marking as if it is changed without actually changing it?

See this:

 using (var context = new BloggingContext())
    {
        var blog = context.Blogs.Find(1);

        context.Entry(blog).Property(u => u.Name).IsModified = true;

        // Use a string for the property name
        context.Entry(blog).Property("Name").IsModified = true;
    }