按键排序字典？

Dictionary<string, string> dict = new Dictionary<string,string>();
dict.Add("3", "three");
dict.Add("1", "one");
dict.Add("2", "two");

var sortedDict = (from entry in dict orderby entry.Key ascending select entry); 

foreach (var k in sortedDict)
{
    Console.WriteLine("key:{0}, val={1} ", k.Key, k.Value);
}

sortedDict = (from entry in dict orderby entry.Key ascending select entry)
            .ToDictionary(x => x.Key, x => x.Value);