字符串和字符数组之间的转换

privatevoid TestStringChars()
{ 
   string str = "mytest"; 
   char[] chars = str.ToCharArray(); 
   this.textBox1.Text =""; 
   this.textBox1.AppendText("Length of \"mytest\" is " + str.Length + "\n"); 
   this.textBox1.AppendText("Length of char array is " + chars.Length +"\n"); 
   this.textBox1.AppendText("char[2] = " + chars[2] +"\n"); 
 }