I've cleaned up the API a bit, added WPF support and several people have added other improvements. I've tried to keep the API simple but it is still a bit more complicated that what you've got there.
We publish DotTwain, which is a .NET TWAIN SDK. It's royalty-free and is used in InspectorTWAIN.com to help certify TWAIN drivers (we're members of the TWAIN working group).
Our product is a .NET Assembly that wraps interop calls.
You could also take a look at EZTwain from Dosadi, which is free. I don't know how native the .NET support is, but they have a way of calling from .NET.
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我已经完成了 Thomas Scheidegger 文章中的代码 (CodeProject：.NET TWAIN 图像扫描）到 GitHub 项目。
我对 API 进行了一些清理，添加了 WPF 支持，并且一些人添加了其他改进。我试图让 API 保持简单，但它仍然比您所得到的要复杂一些。
此外，这个问题还有一些其他选项： .NET Scanning API
I've wrapped up the code from Thomas Scheidegger's article (CodeProject: .NET TWAIN image scanning) into a GitHub project.
I've cleaned up the API a bit, added WPF support and several people have added other improvements. I've tried to keep the API simple but it is still a bit more complicated that what you've got there.
Also this question has some other options: .NET Scanning API
除了 Luke 维护的 TwainDotNet 之外，我最近还注意到 NTwain （项目页面在 Bitbucket 上）。
Besides TwainDotNet maintained by Luke, I have recently noticed NTwain on NuGet (project page on Bitbucket).
免责声明：我在 Atalasoft 工作，
我们发布 DotTwain，它是一个 .NET TWAIN SDK。它是免版税的，并在 InspectorTWAIN.com 中使用，以帮助认证 TWAIN 驱动程序（我们是 TWAIN 工作组的成员） 。
我们的产品是一个包装互操作调用的.NET 程序集。
您还可以查看 Dosadi 的 EZTwain，它是免费的。我不知道 .NET 支持有多原生，但他们有一种从 .NET 调用的方法。
Disclaimer: I work for Atalasoft
We publish DotTwain, which is a .NET TWAIN SDK. It's royalty-free and is used in InspectorTWAIN.com to help certify TWAIN drivers (we're members of the TWAIN working group).
Our product is a .NET Assembly that wraps interop calls.
You could also take a look at EZTwain from Dosadi, which is free. I don't know how native the .NET support is, but they have a way of calling from .NET.
至于 WIA C# 包装器，我在 Codeplex 上发现了 ScanWIA。它没有大量的文档。不过，阅读源代码可能会有所帮助。
As for a WIA C# wrapper, I came across ScanWIA on Codeplex. It doesn't have a whole lot of documentation. However, reading the source code might help.