5     public class DoubleKeyMap<TKey1, TKey2, TValue>
7 …ternal IDictionary<TKey1, IDictionary<TKey2, TValue>> data = new Dictionary<TKey1, IDictionary<TKe…
9         public virtual TValue Put(TKey1 k1, TKey2 k2, TValue v)  in Put()
11             IDictionary<TKey2, TValue> data2;  in Put()
13             TValue prev = default(TValue);  in Put()
16                 data2 = new Dictionary<TKey2, TValue>();  in Put()
27         public virtual TValue Get(TKey1 k1, TKey2 k2)  in Get()
29             IDictionary<TKey2, TValue> data2;  in Get()
32                 return default(TValue);  in Get()
34             TValue value;  in Get()
39         public virtual IDictionary<TKey2, TValue> Get(TKey1 k1)  in Get()
41             IDictionary<TKey2, TValue> value;  in Get()
47         public virtual ICollection<TValue> Values(TKey1 k1)  in Values()
49             IDictionary<TKey2, TValue> data2;  in Values()
66             IDictionary<TKey2, TValue> data2;  in KeySet()
74         public virtual ICollection<TValue> Values()  in Values()
76             Dictionary<TValue, bool> s = new Dictionary<TValue, bool>();  in Values()
77             foreach (IDictionary<TKey2, TValue> k2 in data.Values)  in Values()
79                 foreach (TValue v in k2.Values)  in Values()