C＃我如何返回一個環境變量作爲字符串

Question

在C＃中，我想獲取環境變量的列表，並將它們變成字符串。然而，當我exectute的代碼，我得到錯誤：

嵌入語句不能在字符串聲明或標記語句

的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);  
} 
}  

我該如何解決這個問題，爲什麼會發生這種錯誤？

Answer 1

你需要把{和}在你foreach塊，這是因爲：

1. 你有2個變量聲明
2. 你有超過1行語句

---

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); 
    } 
}