Dictionary排序

public Dictionary<string, int[]> GetWebVisitedTopInfo(Dictionary<string, int[]> websiteVisitInfo, int topCount)
{
Dictionary<string, int[]> websiteTopinfo = new Dictionary<string, int[]>();
List<KeyValuePair<string, int[]>> list = sortByValue(websiteVisitInfo);
int minNub = topCount < websiteVisitInfo.Count ? topCount : websiteVisitInfo.Count;
for (int i = 0; i < minNub; i++)
{
websiteTopinfo.Add(list[i].Key, list[i].Value);
}
return websiteTopinfo;
}

/// <summary>
/// 排序列表
/// </summary>
/// <param name="dict"></param>
/// <returns></returns>
public static List<KeyValuePair<string, int[]>> sortByValue(Dictionary<string, int[]> dict)
{
List<KeyValuePair<string, int[]>> list
= new List<KeyValuePair<string, int[]>>(dict);
list.Sort(
delegate(KeyValuePair<string, int[]> kvp1, KeyValuePair<string, int[]> kvp2)
{
return kvp2.Value[0] - kvp1.Value[0];
});
return list;
}