public void InsertOrUpdate(Group group)
{
if (group.Id == default(int))
{
// New entity
context.Groups.Add(group);
}
else
{
// Existing entity
if (context.Entry(group).State == EntityState.Detached)
{
var entityKey = context.Groups.Create().GetType().GetProperty("Id").GetValue(group);
context.Entry(context.Set <Group>().Find(entityKey)).CurrentValues.SetValues(group);
}
//context.Entry(group).State = EntityState.Modified;
}
}