读操作：
方法1：
string str = File.ReadAllText(@filepath, Encoding.Default);
方法2：
byte[] buffer = File.ReadAllBytes(@filepath); string str = Encoding.Default.GetString(buffer);
方法3：
string[] buffer = File.ReadAllLines(@filepath,Encoding.Default); string str = "" ; foreach (var buf in buffer) { str = str + buf +"\n"; }
方法4：
FileStream fsRead = new FileStream(@filepath, FileMode.OpenOrCreate); byte[] buffer = new byte[1024 * 1024 * 5]; int length = fsRead.Read(buffer, 0, buffer.Length); string str = Encoding.Default.GetString(buffer, 0, length); fsRead.Close(); fsRead.Dispose();
方法5：
string str =""; using (FileStream fsRead = new FileStream(@filepath, FileMode.OpenOrCreate,FileAccess.Read)) { byte[] buffer = new byte[1024 * 1024 * 5]; int length = fsRead.Read(buffer, 0, buffer.Length); str = Encoding.Default.GetString(buffer, 0, length); }
写操作：
方法1：
File.WriteAllText(@filepath, str, Encoding.Default);
方法2：
byte[] buffer = Encoding.Default.GetBytes(str); File.WriteAllBytes(@filepath,buffer);
方法3：
File.WriteAllLines(@filepath, str.Split(‘ ‘),Encoding.Default);
方法4：
FileStream fsWrite = new FileStream(@filepath, FileMode.OpenOrCreate, FileAccess.Write); byte[] buffer = Encoding.Default.GetBytes(str); fsWrite.Write(buffer, 0, buffer.Length); fsWrite.Close(); fsWrite.Dispose();
方法5:
byte[] buffer = Encoding.Default.GetBytes(str); using (FileStream fsWrite = new FileStream(@filepath, FileMode.OpenOrCreate, FileAccess.Write)) { fsWrite.Write(buffer, 0, buffer.Length); }
操作文件夹:
CreateDirectory：创建文件夹
Delete：删除文件夹
Move：剪切文件夹
Exist：判断是否存在
GetFiles：获得指定的目录下所有文件的全路径
GetDirectory：获得指定目录下所有文件夹的全路径
原文：http://www.cnblogs.com/hippieZhou/p/4486453.html