C# --ｔｒｙ ｃａｔｃｈ ｆｉｎａｌｌｙ

catch 和 finally 一起使用的常见方式是：在 try 块中获取并使用资源，在catch 块中处理异常情况，并在finally 块中释放资源。

finally 块用于清除 try 块中分配的任何资源，以及运行任何即使在发生异常时也必须执行的代码。控制总是传递给 finally 块，与 try 块的退出方式无关。

 

复制

// try_catch_finally.cs
using System;
public class EHClass
{
    static void Main()
    {
        try
        {
            Console.WriteLine("Executing the try statement.");
            throw new NullReferenceException();
        }
        catch (NullReferenceException e)
        {
            Console.WriteLine("{0} Caught exception #1.", e);
        }
        catch
        {
            Console.WriteLine("Caught exception #2.");
        }
        finally
        {
            Console.WriteLine("Executing finally block.");
        }
    }
}

示例输出

Executing the try statement.
System.NullReferenceException: Object reference not set to an instance of an object.
   at EHClass.Main() Caught exception #1.
Executing finally block.