FileAccess

FileAccess C#:FileStream(textBox4.Text,FileMode.Open,FileAccess.Read)里面究竟是什么意思?FileMode.Open和FileAccess.Read的究竟是什么意思? FileStream fs1 = new FileStream(DataHelper.URLPlace,FileMode.OpenOrCreate,FileAccess.ReadWrite);和FileStream fs1；fs1 = new FileStream(DataHelper.URLPlace,FileMode.OpenOrCreate,FileAccess.ReadWrite);把这两个实例化代码放在循环里、会 if you want to open a file that exists or create it otherwise,which of the following is right?a)FileStream fs=new FileStream(“c:\myfile.txt”,FileMode.Create,FileAccess.Write);b)FileStream fs=new FileStream(“c:\myfile.txt”,FileMode.CreateNew