List的FindIndex和ForEach

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Diagnostics;

namespace WindowsFormsApplication1
{
    static class Program
    {

        class CADFileItem
        {
            public string GUID;
            public string Name;
            public string ModelClass;
            public string ModelType;
            public CADFileItem()
            {
                this.GUID = "0000-0000-0000-0000";
                this.Name = "NoName";
                this.ModelClass = "Aseembly";
                this.ModelType = "FamilyMain";
            }
            [Conditional("DEBUG")]
            public void WriteLine()
            {
                Debug.WriteLine(string.Format(@"GUID: {0}
Name: {1}
ModelClass: {2}
ModelType: {3}", GUID, Name, ModelClass, ModelType));
            }
        }
        class FindCADFile
        {
            string findValue;
            public FindCADFile(string val)
            {
                findValue = val;
            }

            public bool FindGUID(CADFileItem file)
            {
                return file.GUID == findValue;
            }

            public bool FindName(CADFileItem file)
            {
                return file.Name == findValue;
            }

            public bool FindModelClass(CADFileItem file)
            {
                return file.ModelClass == findValue;
            }
        }

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {

            List<CADFileItem> files = new List<CADFileItem>();
            int intCount = 5;
            for (int u = 0; u < intCount; ++u)
            {
                CADFileItem file = new CADFileItem();
                file.GUID = file.GUID.Replace("-0000", "-000" + u);
                file.Name = "CADFile" + u;
                if(u==0 || u==intCount-1)
                    file.ModelClass = "Part";
                else
                    file.ModelClass = "Assembly";
                file.WriteLine();
                files.Add(file);
            }


            int ret = files.FindIndex(new FindCADFile("0000-0002-0002-0002").FindGUID);
            if (ret != -1)
            {
                Debug.WriteLine("FindGUID--------");
                files[ret].WriteLine();
            } 
            ret = files.FindIndex(new FindCADFile("CADFile3").FindName);
            if (ret != -1)
            {
                Debug.WriteLine("FindName--------");
                files[ret].WriteLine();
            }
            ret = files.FindIndex(new FindCADFile("Part").FindModelClass);
            if (ret != -1)
            {
                Debug.WriteLine("FindModelClass--------");
                files[ret].WriteLine();
            }
            
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}