Microsoft.O365.Security.ETW 5.0.0

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Framework 4.6.2 This package targets .NET Framework 4.6.2. The package is compatible with this framework or higher. 
dotnet add package Microsoft.O365.Security.ETW --version 5.0.0
                    


                    

                
NuGet\Install-Package Microsoft.O365.Security.ETW -Version 5.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Microsoft.O365.Security.ETW" Version="5.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Microsoft.O365.Security.ETW" Version="5.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Microsoft.O365.Security.ETW" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Microsoft.O365.Security.ETW --version 5.0.0
                    


                    

                
#r "nuget: Microsoft.O365.Security.ETW, 5.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Microsoft.O365.Security.ETW@5.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Microsoft.O365.Security.ETW&version=5.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Microsoft.O365.Security.ETW&version=5.0.0
                    


                            Install as a Cake Tool

Microsoft.O365.Security.ETW

A pure .NET library for consuming and decoding Windows Event Tracing for Windows (ETW) events. It calls ETW and TDH directly, without a C++/CLI or mixed-mode assembly dependency.

Installation

dotnet add package Microsoft.O365.Security.ETW --version 5.0.0

The package targets .NET Framework 4.6.2 and 4.8, .NET 8, and .NET 10 on Windows. It ships AnyCPU assemblies for x64 and ARM64 consumers. Live ETW sessions may require elevated permissions, depending on the session and provider.

Reading and testing events

  • Use IEventRecord for compatibility-oriented event access.
  • Use the EventRecordRef ref-struct API for allocation-free payload reads and filtering. Materializing strings, arrays and other objects may allocate.
  • Use the synthetic record/schema builders and proxy helpers to test handlers without a live ETW session.

Event records are callback-scoped: do not retain them after the callback returns. Copy any values that need to outlive the callback.

Migrating from the C++/CLI wrapper

Version 5.0 is a separate package, not an in-place update to Microsoft.O365.Security.Native.ETW 4.x. The namespace remains Microsoft.O365.Security.ETW, but source compatibility is partial and there is no binary compatibility. Rebuild all consumers and review the breaking changes and migration examples.

Documentation and debugging

A companion .snupkg contains portable debugging symbols. Source Link maps the symbols to the exact GitHub source commit used to build the package.

Licensed under the MIT license.

Product Compatible and additional computed target framework versions.
.NET net8.0-windows7.0 is compatible.  net9.0-windows was computed.  net10.0-windows was computed.  net10.0-windows7.0 is compatible. 
.NET Framework net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 is compatible.  net481 was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • .NETFramework 4.6.2

  • .NETFramework 4.8

  • net10.0-windows7.0

    • No dependencies.

  • net8.0-windows7.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
5.0.0 44 11/6/2026

Version 5.0.0:
       - Replaces the C++/CLI wrapper with a pure .NET implementation. The C++/CLI package
         Microsoft.O365.Security.Native.ETW remains a separate 4.x package.
       - Adds an allocation-free EventRecordRef reading surface. Materializing strings,
         arrays and other objects may allocate.
       - No C++/CLI or mixed-mode assembly dependency; one AnyCPU assembly serves x64 and ARM64.
       - Targets net462, net48, net8.0-windows and net10.0-windows.
       - The namespace (Microsoft.O365.Security.ETW) is unchanged, but the public surface is
         only partially source-compatible, with no binary compatibility. Rebuild all consumers
         and review the breaking-change checklists:
         https://github.com/microsoft/krabsetw/blob/master/managed/MIGRATION.md