C# Base 64 编码/解码实现代码

1、base64 to string

   string strpath = "ahr0cdovlziwmy44ms4yos40njo1ntu3l1
 9iywlkds9yaw5ncy9tawrplziwmda3mzgwlte2lm1pza==";     
   byte[] bpath = convert.frombase64string(strpath);
   strpath = system.text.asciiencoding.default.getstring(bpath);

2、string to base64

system.text.encoding encode = system.text.encoding.ascii ;
byte[] bytedata = encode.getbytes( "test");
string strpath = convert.tobase64string(bytedata,0,bytedata.length);