＆QUOT的使用;使用＆QUOT;在C＃中 [英] Uses of "using" in C#

问题描述

KOKOS 回答了精彩的由提是关键字C＃问题隐藏的功能。你能详细说说吗？什么是良好的使用是

User kokos answered the wonderful Hidden Features of C# question by mentioning the using keyword. Can you elaborate on that? What are good uses of using?

推荐答案

究其原因，使用的声明是保证，因为它超出范围的对象尽快处理，而且它不需要明确的code到确保这种情况的发生。

The reason for the "using" statement is to ensure that the object is disposed as soon as it goes out of scope, and it doesn't require explicit code to ensure that this happens.

作为每个<一href=\"http://www.$c$cproject.com/KB/cs/tinguusingstatement.aspx\">http://www.$c$cproject.com/KB/cs/tinguusingstatement.aspx,在.NET CLR转换

As per http://www.codeproject.com/KB/cs/tinguusingstatement.aspx, the .NET CLR converts

using (MyResource myRes = new MyResource())
{
    myRes.DoSomething();
}

到

{ // limits scope of myRes
    MyResource myRes= new MyResource();
    try
    {
        myRes.DoSomething();
    }
    finally
    {
        // Check for a null resource.
        if (myRes!= null)
            // Call the object's Dispose method.
            ((IDisposable)myRes).Dispose();
    }
}

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