using 關鍵字有兩個主要用途:
- 語句
using會在處置對象的結尾定義範圍:string filePath = "example.txt"; string textToWrite = "Hello, this is a test message!"; // Use the using statement to ensure the StreamWriter is properly disposed of using (StreamWriter writer = new StreamWriter(filePath)) { writer.WriteLine(textToWrite); } - 指示
using詞 會建立命名空間的別名,或匯入在其他命名空間中定義的類型:using System; using System.IO;