.net core获取文件内容

private IWebHostEnvironment _hostEnvironment;

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();
}