public virtual T AddOrUpdate(T entity)
{
if (entity == null)
{
return(null);
}
var entry = _context.Entry(entity);
switch (entry.State)
{
case EntityState.Detached:
_context.Add(entity);
break;
case EntityState.Modified:
_context.Update(entity);
break;
case EntityState.Added:
_context.Add(entity);
break;
case EntityState.Unchanged:
//item already in db no need to do anything
break;
default:
throw new ArgumentOutOfRangeException();
}
return(entity);
}
