C＃如何将环境变量作为字符串返回

Question

在C＃中，我想获取环境变量的列表，并将其转换为字符串。 但是，当我执行代码时，出现错误：

嵌入式语句不能是声明或带标签的语句

在字符串teststring = de.Value;

using System;
using System.Collections;
using System.IO;

class Sample
{

public static void Main()
{
    Console.WriteLine();
    Console.WriteLine("GetEnvironmentVariables: ");
    foreach (DictionaryEntry de in Environment.GetEnvironmentVariables())
        string teststring = de.Value;
        string testpath = String.Format("\nValue as string: ",teststring);
        Console.WriteLine(testpath);
        Console.WriteLine("\n  {0} = {1}", de.Key, de.Value);       
}
}    

如何解决此问题，为什么会发生此错误？

Answer 1

您需要将{和}放在foreach块周围，因为：

1. 您有2个变量声明
2. 您有超过1行的陈述

---

public static void Main()
{
    Console.WriteLine();
    Console.WriteLine("GetEnvironmentVariables: ");
    foreach (DictionaryEntry de in Environment.GetEnvironmentVariables())
    {
        string teststring = de.Value;
        string testpath = String.Format("\nValue as string: ",teststring);
        Console.WriteLine(testpath);
        Console.WriteLine("\n  {0} = {1}", de.Key, de.Value);
    }
}