看起来每个人都有自己的宠物命令行解析器，我最好也添加我的:)。

http://bizark.codeplex.com/

这个库包含一个命令行解析器，它将使用命令行中的值初始化一个类。它有很多功能(我已经建立了很多年了)。

从文档中…

怪诞框架中的命令行解析具有以下关键特性:

Automatic initialization: Class properties are automatically set based on the command-line arguments. Default properties: Send in a value without specifying the property name. Value conversion: Uses the powerful ConvertEx class also included in BizArk to convert values to the proper type. Boolean flags: Flags can be specified by simply using the argument (ex, /b for true and /b- for false) or by adding the value true/false, yes/no, etc. Argument arrays: Simply add multiple values after the command-line name to set a property that is defined as an array. Ex, /x 1 2 3 will populate x with the array { 1, 2, 3 } (assuming x is defined as an array of integers). Command-line aliases: A property can support multiple command-line aliases for it. For example, Help uses the alias ?. Partial name recognition: You don’t need to spell out the full name or alias, just spell enough for the parser to disambiguate the property/alias from the others. Supports ClickOnce: Can initialize properties even when they are specified as the query string in a URL for ClickOnce deployed applications. The command-line initialization method will detect if it is running as ClickOnce or not so your code doesn’t need to change when using it. Automatically creates /? help: This includes nice formatting that takes into account the width of the console. Load/Save command-line arguments to a file: This is especially useful if you have multiple large, complex sets of command-line arguments that you want to run multiple times.

一个非常简单易于使用的命令行解析专用类，它支持默认参数。

class CommandLineArgs
{
    public static CommandLineArgs I
    {
        get
        {
            return m_instance;
        }
    }

    public  string argAsString( string argName )
    {
        if (m_args.ContainsKey(argName)) {
            return m_args[argName];
        }
        else return "";
    }

    public long argAsLong(string argName)
    {
        if (m_args.ContainsKey(argName))
        {
            return Convert.ToInt64(m_args[argName]);
        }
        else return 0;
    }

    public double argAsDouble(string argName)
    {
        if (m_args.ContainsKey(argName))
        {
            return Convert.ToDouble(m_args[argName]);
        }
        else return 0;
    }

    public void parseArgs(string[] args, string defaultArgs )
    {
        m_args = new Dictionary<string, string>();
        parseDefaults(defaultArgs );

        foreach (string arg in args)
        {
            string[] words = arg.Split('=');
            m_args[words[0]] = words[1];
        }
    }

    private void parseDefaults(string defaultArgs )
    {
        if ( defaultArgs == "" ) return;
        string[] args = defaultArgs.Split(';');

        foreach (string arg in args)
        {
            string[] words = arg.Split('=');
            m_args[words[0]] = words[1];
        }
    }

    private Dictionary<string, string> m_args = null;
    static readonly CommandLineArgs m_instance = new CommandLineArgs();
}

class Program
{
    static void Main(string[] args)
    {
        CommandLineArgs.I.parseArgs(args, "myStringArg=defaultVal;someLong=12");
        Console.WriteLine("Arg myStringArg  : '{0}' ", CommandLineArgs.I.argAsString("myStringArg"));
        Console.WriteLine("Arg someLong     : '{0}' ", CommandLineArgs.I.argAsLong("someLong"));
    }
}

看看http://github.com/mono/mono/tree/master/mcs/class/Mono.Options/

我强烈建议使用NDesk。选项(文档)和/或Mono。选项(相同的API，不同的名称空间)。文档中的一个例子:

bool show_help = false;
List<string> names = new List<string> ();
int repeat = 1;

var p = new OptionSet () {
    { "n|name=", "the {NAME} of someone to greet.",
       v => names.Add (v) },
    { "r|repeat=", 
       "the number of {TIMES} to repeat the greeting.\n" + 
          "this must be an integer.",
        (int v) => repeat = v },
    { "v", "increase debug message verbosity",
       v => { if (v != null) ++verbosity; } },
    { "h|help",  "show this message and exit", 
       v => show_help = v != null },
};

List<string> extra;
try {
    extra = p.Parse (args);
}
catch (OptionException e) {
    Console.Write ("greet: ");
    Console.WriteLine (e.Message);
    Console.WriteLine ("Try `greet --help' for more information.");
    return;
}

我以前写过一个c#命令行参数解析器。网址:http://www.codeplex.com/CommandLineArguments

c# CLI是我编写的一个非常简单的命令行参数解析库。它是有据可查的开源软件。