using (C# 參考)
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;