Visual Studio 2010:无法更改目标.给出 TargetFrameworkMoniker 错误 [英] Visual Studio 2010 : Can't change target. Gives TargetFrameworkMoniker Error

问题描述

我有一个面向 .NET 2.0 的控制台应用程序

I have a console application which has target .NET 2.0

它很短，但充满了不安全的代码.

It is very short but full of unsafe code.

我将其转换为 VS 2010.我运行正常.

I converted it to VS 2010. I run it OK.

当我尝试将属性中的目标框架"更改为 3.5 或 4.0 时，它显示消息框:

When I try to change "target framework" in properties to 3.5 or 4.0 it shows message box:

TargetFrameworkMoniker:在第 0 行解析应用程序配置文件时出错.XML 文档必须具有顶级元素.

TargetFrameworkMoniker: Error parsing application configuration file at line 0. XML document must have a top level element.

目标仍然是 2.0.

推荐答案

找到了解决方案.只需在文本键盘中打开 app.config(由于某种原因它是空的)并粘贴:

Found the solution. Simply opened app.config in text pad (it was empty for some reason) and pasted:

<?xml version="1.0"?>
<configuration>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

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