.NET API Sample Client Source Code Title: .NET API Sample Client Source Code Description:

This package provides the source code for sample OPC Classic client applications that use the OPC .NET API.


This download includes:


  • .NET Sample Code
  • Reference Server and Client implementations
  • Readme.


Note: This download is recommended for any OPC Classic product development in Microsoft .NET.



The following licenses apply to the different components within this package:


Sample code/ Reference Implementations are provided to OPC Foundation Members as-is for the primary purpose of demonstration and educational purposes. OPC Foundation Members may use the OPC Foundation deliverables for their Product development. (Members are not permitted to distribute OPC Foundation Source code (see OPC Foundation license agreement).


Technical Support

Issues and questions should be reported on the OPC Foundation Community Forum.


Software Lifecycle

This software will be periodically updated to ensure it continues to run on the latest version Windows and .NET Frameworks.

No new features will be added.

When an update occurs the revision number is incremented and prior revisions should be treated as "end-of-life".

Prior revisions are available under the "Archives" tab unless there are security vulnerabilities that were reported to the OPC Foundation.

Reported security vulnerabilities can be found here.


Activities including bug-fixes and feature requests as reported in our Mantis bug-tracking system as described here.



Access: Corporate Member
Version Status Description Date Posted
Download Release OPC NET API Sample Clients (ZIP/VS Projects) 2022-05-31 Icon
Version Status Description Date Posted
3.0.106 Release Installer/Binaries: .NET 4.5 (Signed) 2016-06-10 Icon
3.00.106 Release Installer/Binaries: .NET 4.5 2015-06-24 Icon
3.00.106 Release Source Code (C# Visual Studio 2013) 2015-06-24 Icon
3.00.106 Release .NET API Redistributables (MSI) 2015-06-24 Icon Release .NET API Sample Code and Applications 2012-12-31 Icon Release DA 3 Sample Code and Applications 2011-01-18 Icon
3.00.400.0 Release DA 3 Sample Code and Applications 2011-01-01 Icon