C#并发读取文件

项目中要读取琐碎的文件内容，顺序执行比较耗时，所以编写以下下并发读取函数，读取时可以指定线程数，或者根据cpu数调用：

使用代码：

var fileContents = ParallelReadFile(files, Environment.ProcessorCount);

并发读取函数：

        public static IDictionary<string, string> ParallelReadFile(string[] files, int maxThread = 4)
        {
            var fileCount = files.Length;
            var section = (int)Math.Ceiling((fileCount * 1.0) / maxThread);
            var readResult = new Dictionary<string, string>();
            ParallelLoopResult result = Parallel.For(0, maxThread, threadIndex =>
            {
                var beginIndex = section * threadIndex;
                var endIndex = beginIndex + section;
                if (endIndex > fileCount)
                {
                    endIndex = fileCount;
                }
                for (int i = beginIndex; i < endIndex; i++)
                {
                    var filePath = files[i];
                    var content = File.ReadAllText(filePath);
                    readResult.Add(filePath, content);
                }
            });
            return readResult;
        }