Dictionary Union and Sort by value

时间：2010-09-29 来源：IT老民工

1. 把两个DICTIONARY 叠加在一起。并且返回DICTIONARY.

2. 给DICTIONARY的VALUE排序。

我从GOOGLE上找不到现成的，只好花时间写了两段。希望节约大家的时间。

public static Dictionary<TKey, TValue> UnionDictionary<TKey, TValue>
                (this Dictionary<TKey, TValue> first, Dictionary<TKey, TValue> second)
        {
        Dictionary<TKey, TValue> Rtn = new Dictionary<TKey, TValue>();
        var collection = first.Union(second);
        foreach (var item in collection)
        {
                Rtn.Add(item.Key, item.Value);
        }
        return Rtn;
        }

        public static Dictionary<TKey, TValue> SortByValue<TKey, TValue>(this Dictionary<TKey, TValue> dic)
        {
        Dictionary<TKey, TValue> Rtn = new Dictionary<TKey, TValue>();
        var collection = dic.OrderBy(item => item.Value);
        foreach (var item in collection)
        {
                Rtn.Add(item.Key, item.Value);
        }
        return Rtn;
        }

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