Update manager and add features for App Installer.

Launch/Program.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+namespace Launch
+{
+	static class Program
+	{
+
+		/// <summary>
+		/// 从 args[startIndex..] 生成安全的命令行字符串
+		/// </summary>
+		private static string BuildCommandLine (string [] args, int startIndex)
+		{
+			if (args.Length <= startIndex) return null;
+			var sb = new StringBuilder ();
+			for (int i = startIndex; i < args.Length; i++)
+			{
+				if (i > startIndex) sb.Append (' ');
+				sb.Append (EscapeArgument (args [i]));
+			}
+			return sb.ToString ();
+		}
+		/// <summary>
+		/// 按 Win32 命令行规则转义单个参数
+		/// </summary>
+		private static string EscapeArgument (string arg)
+		{
+			if (string.IsNullOrEmpty (arg)) return "\"\"";
+			bool needQuotes = false;
+			foreach (char c in arg)
+			{
+				if (char.IsWhiteSpace (c) || c == '"')
+				{
+					needQuotes = true;
+					break;
+				}
+			}
+			if (!needQuotes) return arg;
+			var sb = new StringBuilder ();
+			sb.Append ('"');
+			foreach (char c in arg)
+			{
+				if (c == '"') sb.Append ("\\\"");
+				else sb.Append (c);
+			}
+			sb.Append ('"');
+			return sb.ToString ();
+		}
+		/// <summary>
+		/// 应用程序的主入口点。
+		/// </summary>
+		[STAThread]
+		static void Main (string [] args)
+		{
+			if (args == null || args.Length == 0)
+			{
+				MessageBox.Show ("Missing AppUserModelId.", "Launch Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				return;
+			}
+			string appUserModelId = args [0];
+			string argumentLine = BuildCommandLine (args, 1);
+			AppxPackage.PackageManager.ActiveApp (appUserModelId, string.IsNullOrEmpty (argumentLine) ? null : argumentLine);
+		}
+	}
+}