C#中 char、byte、string

var str = "我是中国人";
var str1 = "abc";
char[] chars = str.ToCharArray();
char[] chars1 = str1.ToCharArray();
byte[] bytes = Encoding.Default.GetBytes(chars); 
byte[] bytes1 = Encoding.Default.GetBytes(chars1);
var newStr = Encoding.Default.GetString(bytes);

Results: chars equal char [5] { 'I', 'a', 'in', 'country', 'person'} 
　　　　chars1 equal char [. 3] { 'A', 'B', 'C'} 
　　　　bytes equal to byte [10] {206, 210, 202, 199, 214, 208, 185, 250, 200 is, 203} 
　　　　bytes 1 equal to byte [. 3] {97, 98, 99} 
　　　　newStr equal to "I am Chinese" 

analysis: 
　　1, char Chinese characters can be displayed, not byte to 
　　2, the char to any one of a character takes, Chinese accounted byte to 2, representing an English or other 
　　3, are interchangeable between the three types 
　　4, byte to ascii code array shows