/// <summary>
/// 2つの<see cref="DoubleKey{TKey1, TKey2}"/>のインスタンスの同値性を確かめる
/// </summary>
/// <param name="other">同値性を確かめるもう一つの<see cref="DoubleKey{TKey1, TKey2}"/>のインスタンス</param>
/// <returns>同値であったらtrue，それ以外でfalse</returns>
public bool Equals(DoubleKey <TKey1, TKey2> other)
{
var key1Equal = EqualityComparer <TKey1> .Default.Equals(Key1, other.Key1);
var key2Equal = EqualityComparer <TKey2> .Default.Equals(Key2, other.Key2);
return(key1Equal && key2Equal);
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="doubleKey">格納する<see cref="DoubleKey{TKey1, TKey2}"/></param>
/// <param name="value">格納する<typeparamref name="TValue"/></param>
internal DoubleKeyValuePair(DoubleKey <TKey1, TKey2> doubleKey, TValue value) : this(doubleKey.Key1, doubleKey.Key2, value)
{
}