C# 文件读写

1.文本文件读写

//读
FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);
StreamReader reader = new StreamReader(fs, Encoding.Unicode);

while ((readStr = reader.ReadLine()) != null)
{
    string str = readStr.ToString();
}

fs.Close();
reader.Close();

//写
StreamWriter writer;
writer = new StreamWriter(filePath, false, Encoding.Unicode);
string str = "hello";
writer.WriteLine((string)str);
writer.Flush();
writer.Close();

2.二进制文件读写

//读
FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs, Encoding.Unicode);
try
{
　　while (true)
　　{
　　　　string str= br.ReadString();
　　}
}
catch (EndOfStreamException ex)
{
　　Debug.WriteLine("读取完毕");
}    

//写
FileStream fs;
BinaryWriter bw;
fs = new FileStream(filePath,FileMode.Create);
bw = new BinaryWriter(fs, Encoding.Unicode);
string str = "hello";
bw.Write((string)str);