1.txt，10.txt ，2.txt，3txt 排序
怎么c# 编写   把1.txt，10.txt ，2.txt，3txt 排序成为 1.txt，2.txt，3txt 10.txt 
我是个初学者  请各位帮帮忙
------解决方案--------------------
    public class NameSorter : IComparer
    {
        public int Compare(object x, object y)
        {
            if (x == null && y == null)
            {
                return 0;
            }
            if (x == null)
            {
                return -1;
            }
            if (y == null)
            {
                return 1;
            }
            FileInfo xInfo = new FileInfo(x.ToString());
            FileInfo yInfo = new FileInfo(y.ToString());
            if (xInfo.FullName.Length > yInfo.FullName.Length)
            {
                return 0;
            }
            return xInfo.FullName.CompareTo(yInfo.FullName);
        }