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TransactedInstaller Class

Defines an installer that either succeeds completely or fails and leaves the computer in its initial state.

Namespace:  System.Configuration.Install
Assembly:  System.Configuration.Install (in System.Configuration.Install.dll)

public class TransactedInstaller : Installer

To run installers in a transaction, add them to the Installers property of this TransactedInstaller instance.

The following example demonstrates the TransactedInstaller, Install and Uninstall methods of the TransactedInstaller class.

This example provides an implementation similar to that of Installer Tool (Installutil.exe). It installs assemblies with the options preceding that particular assembly. If an option is not specified for an assembly, the previous assembly's options are used if there is a previous assembly in the list. If either the "/u" or "/uninstall" option is specified, the assemblies are uninstalled. If the "/?" or "/help" option is provided, the help information is displayed to the console.

ArrayList myOptions = new ArrayList();
String myOption;
bool toUnInstall = false;
bool toPrintHelp = false;
TransactedInstaller myTransactedInstaller = new TransactedInstaller();
AssemblyInstaller myAssemblyInstaller;
InstallContext myInstallContext;

   for(int i = 0; i < args.Length; i++)
      // Process the arguments. 
      if(args[i].StartsWith("/") || args[i].StartsWith("-"))
         myOption = args[i].Substring(1);
         // Determine whether the option is to 'uninstall' an assembly. 
         if(String.Compare(myOption, "u", true) == 0 ||
            String.Compare(myOption, "uninstall", true) == 0)
            toUnInstall = true;
         // Determine whether the option is for printing help information. 
         if(String.Compare(myOption, "?", true) == 0 ||
            String.Compare(myOption, "help", true) == 0)
            toPrintHelp = true;
         // Add the option encountered to the list of all options 
         // encountered for the current assembly.
         // Determine whether the assembly file exists. 
            // If assembly file doesn't exist then print error.
            Console.WriteLine("\nError : {0} - Assembly file doesn't exist.",

         // Create a instance of 'AssemblyInstaller' that installs the given assembly.
         myAssemblyInstaller = 
            new AssemblyInstaller(args[i], 
            (string[]) myOptions.ToArray(typeof(string)));
         // Add the instance of 'AssemblyInstaller' to the 'TransactedInstaller'.  
   // If user requested help or didn't provide any assemblies to install 
   // then print help message. 
   if(toPrintHelp || myTransactedInstaller.Installers.Count == 0)

   // Create a instance of 'InstallContext' with the options specified.
   myInstallContext = 
      new InstallContext("Install.log", 
      (string[]) myOptions.ToArray(typeof(string)));
   myTransactedInstaller.Context = myInstallContext;

   // Install or Uninstall an assembly depending on the option provided. 
      myTransactedInstaller.Install(new Hashtable());
catch(Exception e)
   Console.WriteLine("\nException raised : {0}", e.Message);


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0