C#访问数据库；C#实现九宫格算法；C#实现天干地支算法；C#正则表达式查找汉语重叠词语并计算正确率召回率F值；C#比较三种泛型容器和排序速度-C# to access the database　C# implementation squares algorithm　C# implementation attribution algorithm　C# regular expression search Chinese overlapping words and calculates the correct rate recall F value　C# compare three generic containers and sorting speed