.net core获取文件内容
参考微软提供帮助文档：ASP.NET Core 中的文件提供程序
1-注入IWebHostEnvironment：
private IWebHostEnvironment _hostEnvironment;
2-读取根目录下文件内容（Templates/Index.html）：
IFileProvider fileProvider = this._hostEnvironment.ContentRootFileProvider; IFileInfo fileInfo = fileProvider.GetFileInfo("Templates/Index.html"); string fileContent = null; using (StreamReader readSteam = new StreamReader(fileInfo.CreateReadStream())) { fileContent = await readSteam.ReadToEndAsync(); }