.NET命令行解析器示例程序（命令行選項功能）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using CommandLine;
using CommandLine.Text;

namespace CopyFiles
{
    class Options
    {
        [Option(
            's', "source", Required = true,
            HelpText = "源目錄。")]
        public string SourcePath { get; set; }

        [Option(
            'p', "pattern", Required = true,
            HelpText = "文件模式。")]
        public string SearchPattern { get; set; }

        [Option(
            't', "target", Required = true,
            HelpText = "目標目錄。")]
        public string TargetPath { get; set; }

        [Option('a', "all", DefaultValue = true,
            HelpText = "是否包含所有目錄？")]
        public bool AllDirectories { get; set; }

        [Option('o', "overwrite", DefaultValue = true,
            HelpText = "是否覆蓋所有文件？")]
        public bool Overwrite { get; set; }

        [Option('v', "verbose", DefaultValue = true,
            HelpText = "是否打印消息？")]
        public bool Verbose { get; set; }

        [HelpOption]
        public string GetUsage()
        {
            return HelpText.AutoBuild(this);
        }

        public void WriteLine(string format, params object[] args)
        {
            if (this.Verbose)
            {
                Console.WriteLine(string.Format(format, args));
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using CommandLine;
using Happy.Utils;

namespace CopyFiles
{
    class Program
    {
        static void Main(string[] args)
        {
            var options = new Options();
            if (Parser.Default.ParseArguments(args, options))
            {
                FileUtil.Copy(
                    options.SourcePath,
                    options.SearchPattern,
                    options.TargetPath,
                    (sourceFile, targetFile) =>
                    {
                        options.WriteLine("拷貝文件：{0} 到 {1}", sourceFile, targetFile);
                    },
                    (exceptionInfo) =>
                    {
                        options.WriteLine(exceptionInfo.Exception.Message);

                        exceptionInfo.ExceptionHandled = true;
                    },
                    options.AllDirectories,
                    options.Overwrite);
            }
        }
    }
}