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IAssemblyPostProcessor.PostProcessAssembly Method

Called before the assembly is loaded to allow the implementing class to modify the assembly.

Namespace:  System.Web.Compilation
Assembly:  System.Web (in System.Web.dll)

void PostProcessAssembly(
	string path


Type: System.String

The path to the assembly.

The AssemblyBuilder class calls this method after the assembly has been compiled. Any actions to be taken before loading the assembly should be included in this method.

The following code example demonstrates how to create an implementation of the IAssemblyPostProcessor interface, and register it in the Web.config file of a Web application.

The first part of the code example creates a class named Samples.Process.postProcessTest that implements the IAssemblyPostProcessor interface. This class performs the simple action of writing a file when the PostProcessAssembly method is called.

using System;
using System.Web.Compilation;
using System.IO;

namespace Samples.Process
    public class postProcessTest : IAssemblyPostProcessor
        public static void Main(String[] args)

        public void PostProcessAssembly(string path)
            StreamWriter sw = File.CreateText(@"c:\compile\MyTest.txt");
            sw.WriteLine("Compiled assembly:");

        public void Dispose()


Compile the class into a .dll file with the command csc /target:library postProcessTest.cs. Add the resulting .dll file to the Bin folder of an ASP.NET application and register the .dll in the Web.config file, as shown in the following code.

<compilation debug="true" assemblyPostProcessorType="Samples.Process.postProcessTest" />

When a user visits the Web site, the Web application is dynamically compiled and the file MyTest.txt will be written to C:\compile.

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