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TransactedInstaller.Install Method

Performs the installation.

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

public override void Install(
	IDictionary savedState


Type: System.Collections.IDictionary

An IDictionary in which this method saves information needed to perform a commit, rollback, or uninstall operation.


The savedState parameter is null.


The installation failed, and is being rolled back.

This method calls the Install method of each installer contained in the Installers property of this instance. The IDictionary object referenced by the savedState parameter is updated to reflect the status of the installation after the contained installers have run. If all the Install methods succeed, the Commit method is called. Otherwise, the Rollback method is called for each installer.

Notes to Callers:

The IDictionary specified by the savedState parameter should be empty when passed to the Install method.

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

This example provides an implementation similar to that of InstallUtil.exe. It installs assemblies with the options preceding that particular assembly. If an option is not specified for an assembly, the previous assemblies options are taken if there is a previous assembly in the list. If the '/u' or '/uninstall' option is specified then the assemblies are uninstalled. If the '/?' or '/help' option is provided then the help information is printed 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);

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