LINQ中与C#的Intersect方法

ScoresContent123.xml
ScoresContenthi.xml
Scores123.xml

PowerContent123.xml
PowerContenthelo.xml
Power123.xml

这是来自C#代码

System.IO.DirectoryInfo dir1 = new System.IO.DirectoryInfo(path1);
        System.IO.DirectoryInfo dir2 = new System.IO.DirectoryInfo(path2);

        IEnumerable<System.IO.FileInfo> list1 = dir1.GetFiles("*.*",System.IO.SearchOption.AllDirectories);
        IEnumerable<System.IO.FileInfo> list2 = dir2.GetFiles("*.*",System.IO.SearchOption.AllDirectories);

        FileCompare myFileCompare = new FileCompare();

        bool areIdentical = list1.SequenceEqual(list2,myFileCompare);

        if (areIdentical == true)
        {
            Console.WriteLine("the two folders are the same");
        }
        else
        {
            Console.WriteLine("The two folders are not the same");
        }


        var queryCommonFiles = list1.Intersect(list2,myFileCompare);

queryCommonFiles仅从Content文件夹返回123.xml,而不返回另一个.

这是FileCompare的代码

class FileCompare : System.Collections.Generic.IEqualityComparer<System.IO.FileInfo>
{

    public FileCompare() { }

    public bool Equals(System.IO.FileInfo f1,System.IO.FileInfo f2)
    {
        return (f1.Name == f2.Name &&
                f1.Length == f2.Length);
    }

    // Return a hash that reflects the comparison criteria. According to the 
    // rules for IEqualityComparer<T>,if Equals is true,then the hash codes must
    // also be equal. Because equality as defined here is a simple value equality,not
    // reference identity,it is possible that two or more objects will produce the same
    // hash code.
    public int GetHashCode(System.IO.FileInfo fi)
    {
        string s = String.Format("{0}{1}",fi.Name,fi.Length);
        return s.GetHashCode();
    }

}

编辑：

var queryList1Only = (from file in list1
                                  select file).Except(list2,myFileCompare);

            Console.WriteLine("The following files are in list1 but not list2:n");
            foreach (var v in queryList1Only)
            {
                Console.WriteLine(v.FullName);
            }


            var queryList2Only = (from file in list2
                                  select file).Except(list1,myFileCompare);

            Console.WriteLine("The following files are in list2 but not list1:n");
            foreach (var v in queryList2Only)
            {
                Console.WriteLine(v.FullName);
            }

这将生成list1的hi.xml和list2的helo.xml.正如我所说的交叉方法只有一个123.xml.

任何建议,将不胜感激

谢谢,