.Net Core 写入文件

using Sys =  System;
using System.IO;

    /// 

        /// 写入文件
        /// 
        /// 文件路径
        /// 文件内容
        public static void WriteFile(string path, string content)
        {
            if (!Sys.IO.File.Exists(path))
            {
                var f = Sys.IO.File.Create(path);
                f.Close();
            }
            var f2 = new StreamWriter(path, true, Encoding.GetEncoding("gb2312"));
            f2.WriteLine(content);
            f2.Close();
            f2.Dispose();
        }