private void Init(bool isNew)
{
this.keyIsAssigned = this.GetEntityMetadata().GetKeyProperties().All(x => !Equals(x.Property.Get(this), x.Property.Type.DefaultOf()));
if (isNew)
{
MarkNew();
}
else
{
if (!this.keyIsAssigned)
{
throw new InvalidOperationException($"Entity of type {this.GetType().Name} cannot be marked as existing when all of the key property values are default");
}
MarkExisting();
}
ChangeTracker.BeginTrackingDeep();
}
