using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace vCloud.Windows.ForceUpgrade
{
    public static class FileHelper
    {
        /// <summary>
        /// 追加写入文件
        /// </summary>
        /// <param name="fileName">文件名</param>
        /// <param name="contexts">文件内容</param>
        /// <param name="encodingStr">文件编码</param>
        public static void AppendWriteFile(string fileName, string contexts, string encodingStr = "UTF-8")
        {
            try
            {
                if (!string.IsNullOrEmpty(fileName))
                {
                    using (FileStream fs = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.ReadWrite))
                    {
                        Encoding textEncoding = Encoding.GetEncoding(encodingStr.ToUpper());
                        using (StreamWriter streamWriter = new StreamWriter(fs, textEncoding))
                        {
                            streamWriter.Write(contexts);
                        }
                    }
                }
            }
            catch
            { 
                
            }
        }
    }
}