使用相同的nuget包的两个不同版本 [英] Using two different versions of same the nuget package

问题描述

我想使用两个不同版本的同一库(OpenCVSharp 2.x和OpenCVSharp 3.x) 好吧，我将这两个程序包都下载到了单独的项目中(我们称之为OCV2Wrapper和OCV3Wrapper)，并在我的项目中引用了这两个包装器.我必须从一个软件包(2.x)重命名库并手动引用它们，因为:

I wanted to use two different version same library (OpenCVSharp 2.x and OpenCVSharp 3.x) Well i downloaded those two packages both to the separate project (lets call it OCV2Wrapper and OCV3Wrapper) and reference both wrappers in my project. I had to renamed libraries from one package (2.x) and reference them manualy because: Can we add 2 different versions of same package in NuGet. I read about external aliases and I used external alias in one of the wrappers (2.x in my case). But I have some major problems:

• 我重命名的库不会复制到启动项目的版本(引用两个包装器的那个库)，而是在2.x包装器的构建器中
• 它不起作用，因为它说即使我从2.x包装器手动复制了已重命名的库，也无法从2.x包装器中找到类型.

在C#中针对这种情况的正确方法是什么?

What is the correct approach for this scenario in C#?

我想在解决方案中同时使用两个包装器，因为2.x版本包含算法(SIFT和SURF)，而3.x版本包含算法(Kaze和AKaze). 我可以相信这两个软件包都不会使用nuget，但我更喜欢3.x来自nuget并手动配置了2.x版本.

I want to use both wrappers in solution because 2.x version contains algorithms (SIFT and SURF) and 3.x verison contains algorithms (Kaze and AKaze). I can live that both packages would be out of nuget but i prefer that 3.x is from nuget and 2.x version is manually configured.

推荐答案

如上所述，只要引用在两个不同版本的NuGet程序包中进行引用，就不会有问题.

As already stated there is nothing wrong with referencing 2 different versions of of a NuGet package, as long as it's in different Visual Studio Projects that those references are made.

但这也是容易的部分结束的地方，但是我认为还有一些选择.根据您的需求，我会看到以下选项.

But this is also where the easy part ends, but I think there are a few options left. Depending on your needs I see the following options.

1. 创建一个后构建步骤，以将多版本程序集注册到GAC中.只要每个程序集具有不同的程序集版本，CLR就会在需要时从GAC中选择正确的程序集.
2. 创建一个构建后步骤，将不同的程序集复制到应用程序bin文件夹的子文件夹中，例如 bin/package-v1 和 bin/package-v2 .然后，您可以在应用程序中覆盖 AssemblyResolve 事件，如此处 https://msdn.microsoft.com/zh- us/library/4191fzwb(v = vs.110).aspx

1. Create a post build step which register the multi-versioned assemblies into the GAC. As long as each assembly have different assembly version, the CLR will pick up the right assembly from the GAC when needed.
2. Create a post build step which copy the different assemblies into a subfolder of you application bin folder like bin/package-v1 and bin/package-v2. Then you can in your application override the AssemblyResolve event like described here https://msdn.microsoft.com/en-us/library/ff527268(v=vs.110).aspx. This will make it possible for you to load the assembly in the right version at the time of need.
3. If you don't want to play around with AssemblyResolve, then you can also modify your web/app.config to do assembly redirect/probing as described here https://msdn.microsoft.com/en-us/library/4191fzwb(v=vs.110).aspx

希望这会有所帮助，因此您下次不必修改第三方源代码.

Hope this helps a bit, so you don't have to modify third party source code next time.

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