Mitch Wheat - Treat the cause, not the symptoms!

If you want a full blown Command Line Parser then there are several good options available:

• Command Line Parser Library
• NDesk.Options
• Powerful and simple command line parsing in C#

[I used the Command Line Parser Library recently in the SQL Diagnostic Runner I wrote.]

If you just want a very basic parser, supporting simple options in the format  /argname:argvalue  then you could use this:

/// <summary>
/// Very basic Command Line Args extracter
/// <para>Parse command line args for args in the following format:</para>
/// <para>    /argname:argvalue /argname:argvalue ...</para>
/// </summary>
public class CommandLineArgs
{
    private const string Pattern = @"\/(?<argname>\w+):(?<argvalue>.+)";
    private readonly Regex _regex = new Regex(Pattern, RegexOptions.IgnoreCase|RegexOptions.Compiled);
    private readonly Dictionary<String, String> _args = new Dictionary<String, String>();

    public CommandLineArgs()
    {
        BuildArgDictionary();
    }

    public string this[string key]
    {
        get { return _args.ContainsKey(key) ? _args[key] : null; }
    }

    public bool ContainsKey(string key)
    {
        return _args.ContainsKey(key);
    }

    private void BuildArgDictionary()
    {
        var args = Environment.GetCommandLineArgs();
        foreach (var match in args.Select(arg => _regex.Match(arg)).Where(m => m.Success))
        {
            try
            {
                _args.Add(match.Groups["argname"].Value, match.Groups["argvalue"].Value);
            }
            // Ignore any duplicate args
            catch (Exception) {}
        }
    }
}