Dictionary中如何用键查找值，或值查找键？
如题，有这样一个波特率的Dictionary  
Dictionary<int, int> Dic_BandRate = new Dictionary<int, int>()
{
  {10,115200},{11,57600},{12,38400},{13,19200},{14,9600},{15,4800}
};
如何根据上层传来的9600，找到14这个值，总感觉一句话就可以觉得的，还是没实现，谢谢各位！

------解决方案--------------------

探讨

C# code

void Main()
{
Dictionary<int, int> Dic_BandRate = new Dictionary<int, int>()
{
{10,115200},{11,57600},{12,38400},{13,19200},{14,9600},{15,4800}
};
var query=from d……

------解决方案--------------------
这样就可以了吧：

var key = Dic_BandRate.Single(k => k.Value == 9600).Key;

如果有可能值不存在，那么就用SingleOrDefault
var keyvaluepair = Dic_BandRate.SingleOrDefault(k => k.Value == 9600);

var key = keyvaluepair == null ? 0 : keyvaluepair.Key;


------解决方案--------------------
给出我自己的思路

C# code

 Dictionary<int, int> Dic_BandRate = new Dictionary<int, int>()
                {
                {10,115200},{11,57600},{12,38400},{13,19200},{14,9600},{15,4800}
                };
            var query = from d in Dic_BandRate
                        where d.Value == 9600
                        select d.Key;
            Console.WriteLine(query.FirstOrDefault());