是否有与4.0的AppendAllLines等效的.NET 3.5? [英] Is there a .NET 3.5 equivalent of 4.0's AppendAllLines?

问题描述

var output = DataList.Select(x => x.blah blah blah); 
string outputFilePath = @"C:\output.txt";
File.AppendAllLines(outputFilePath, output);

我上面的.NET 4代码被放置在for/next循环中，该循环重复了几次，因此附加是必需的(与覆盖/重写相反).现在，有人告诉我我必须改用.NET 3.5，并且AppendAllLines吐出错误"System.IO.File"不包含AppendAllLines的定义.

My above .NET 4 code was put in a for/next loop that iterates a few times, so appending is necessary (as opposed to overwriting/rewriting). Now, I've been told I have to use .NET 3.5 instead and AppendAllLines spits out the error 'System.IO.File' does not contain a definition for AppendAllLines.

有人知道不需要我彻底修改现有代码并使用.NET 3.5的修复程序吗?

Does anyone know of a fix that does not require me to change my existing code too drastically and uses .NET 3.5?

推荐答案

使用适当的流传输，框架中没有任何东西可以做到这一点，但是您可以很容易地编写自己的方法:

Nothing in the framework exists to do exactly that, using the proper streaming, but you can write your own method easily enough:

public static void AppendAllLines(string path, IEnumerable<string> lines)
{
    using (var writer = new StreamWriter(path, true))
        foreach (var line in lines)
            writer.WriteLine(line);
}

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