是否在.NET Framework 4.0 intaller安装.NET 3.5呢？ [英] Does the .NET Framework 4.0 intaller installs .NET 3.5 as well?

问题描述

.NET 4.0是为了与3.5运行并排侧，将无法运行3.5应用程序，这是使我对有指导我的用户下载.NET 3.5，而不仅仅是最新版本担心。

.NET 4.0 is meant to run side-by-side with 3.5 and won't run 3.5 apps, which is making me worried about having to instruct my users to download .NET 3.5 instead of just "the latest version".

我读过在博客中的4.0安装程序将安装3.5，以及如果它尚未安装，但我不能马上进行测试，有没有人尝试这个还是有来自可靠来源的答案？

I've read in a blog that the 4.0 installer will install 3.5 as well if it's not already installed but I can't test it right now, did anyone try this or have an answer from a trusted source?

推荐答案

我能在.NET 4.0只箱子来测试它，它也不会跑出来的最盒（找不到运行时版本错误），但你的回答让我搜索一下这些配置文件，我找到了一种方法，使其在3.5可用时运行，但回落到4.0。这是code，其他人是否有同样的问题：

I was able to test it in a .NET 4.0 only box and it wouldn't run out-of-the-box (could not find runtime version error) but your answer made me search about those config files and I found a way to make it run on 3.5 when available but fall back to 4.0. This is the code, if anyone else is having the same issue:

<?xml version="1.0"?>
<configuration>
    <startup useLegacyV2RuntimeActivationPolicy="false">
        <supportedRuntime version="v2.0.50727" />
        <supportedRuntime version="v4.0" />
    </startup>
</configuration>

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