求助，判断文件是否存在，不存在创建。代码出现bug,请高手指点

Question

if (myFile.Exists == false)
            {
                myFile.Create().Close();
            }

Answer 1

我也碰到过类似的情况，不要用fileinfo.create 来创建文件.改用文件流
FileInfo myFile = new FileInfo(Application.StartupPath + "/logintext.txt");
            if (myFile.Exists == false)
            {
                using (FileStream fs = myFile.Create())
                {
                   Byte[] info =    new UTF8Encoding(true).GetBytes("This is some text in the file.");                   
                    fs.Write(info, 0, info.Length);
                }            }
        
            StreamReader sr = null;
            sr = new StreamReader(Application.StartupPath + "/logintext.txt", System.Text.Encoding.UTF8);
            string mystr = sr.ReadLine();
            textBox1.Text = mystr;
            sr.Close();

Answer 2

FileInfo myFile = new FileInfo(Application.StartupPath + "/logintext.txt");
if (!myFile.Exists)
{
FileStream fs = File.Create(myFile.FullName);
fs.Close();
}

Answer 3

if(!System.IO.File.Exists(Application.StartupPath+@"\logintext.txt"))
{
    System.IO.File.Create(Application.StartupPath+@"\logintext.txt");}

Answer 4

问题解决
            FileInfo myFile = new FileInfo(Application.StartupPath + @"\logintext.txt");
            FileStream fs = null;
            if (myFile.Exists == false)
            {
                fs = myFile.Create();
            }
            else
            {
                fs = myFile.Open(FileMode.Open);
            }
                        StreamReader sr = null;
            sr = new StreamReader(fs);
            string mystr = sr.ReadLine();
            loginuser.Text = mystr;
            sr.Close()