/// <summary>
/// Check that this bag and another bag were created with the same comparison
/// mechanism. Throws exception if not compatible.
/// </summary>
/// <param name="otherBag">Other bag to check comparision mechanism.</param>
/// <exception cref="InvalidOperationException">If otherBag and this bag don't use the same method for comparing items.</exception>
private void CheckConsistentComparison(Bag <T> otherBag)
{
otherBag.ShouldNotBeNull("otherBag");
Guard.Assert(Equals(_equalityComparer, otherBag._equalityComparer), Strings.InconsistentComparisons);
}
