备份一个有的时候，可能需要把其它exe或者dll包含在主程序中....

1、选中附件，右键生成操作选择  嵌入的资源，例如：handle.exe

2、FileUtil

using System.IO;
using System.Reflection;

namespace ResourceOccupancyHelp
{
    public class FileUtil
    {
        /// <summary>
        /// 从资源文件中抽取资源文件
        /// </summary>
        /// <param name="resFileName">资源文件名称（资源文件名称必须包含目录，目录间用“.”隔开,最外层是项目默认命名空间）</param>
        /// <param name="outputFile">输出文件</param>
        public static void ExtractResFile(string resFileName, string outputFile)
        {
            BufferedStream inStream = null;
            FileStream outStream = null;
            try
            {
                Assembly asm = Assembly.GetExecutingAssembly(); //读取嵌入式资源
                inStream = new BufferedStream(asm.GetManifestResourceStream(resFileName));
                outStream = new FileStream(outputFile, FileMode.Create, FileAccess.Write);

                byte[] buffer = new byte[1024];
                int length;

                while ((length = inStream.Read(buffer, 0, buffer.Length)) > 0)
                {
                    outStream.Write(buffer, 0, length);
                }
                outStream.Flush();
            }
            finally
            {
                if (outStream != null)
                {
                    outStream.Close();
                }
                if (inStream != null)
                {
                    inStream.Close();
                }
            }
        }
    }
}

3、调用demo

FileUtil.ExtractResFile("ResourceOccupancyHelp.handle.exe", System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "handle.exe"));

特别注意，生成的exe需要用命名空间最前缀，如果有文件夹的话也需要完整加上。