public void Test2()
{
EqualityComparison <int> ec = (i1, i2) => i1 == i2;
var t = ec.ToEqualityComparer();
Assert.True(t.Equals(1, 1));
Assert.Equal(1, t.GetHashCode(1));
}
/// <summary>
/// Initializes a new instance of the <see cref="HashBag{T}"/> class.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="comparison">The comparer. If null <paramref name="comparer"/> will be use.</param>
/// <param name="comparer">The comparer. If null <paramref name="comparison"/> will be use.</param>
/// <exception cref="ArgumentNullException"><paramref name="comparer"/> and <paramref name="comparison"/> are null.</exception>
protected HashBag(IEnumerable <T> collection, EqualityComparison <T> comparison, IEqualityComparer <T> comparer)
{
Check.Current.Requires <ArgumentNullException>(comparer != null || comparison != null, CollectionResource.Initialize_ArgumentNullException_ComparerAndComparison);
this.equalityComparer = comparison ?? comparer.Equals;
this.Model = new Dictionary <T, int>(comparer ?? comparison.ToEqualityComparer());
this.AddRange(collection);
}
