C# 生成验证码取随机数字加字母(改进版)

var text2 = ""; 
var random = new Random((int)DateTime.Now.Ticks); 
const string textArray = "23456789ABCDEFGHGKLMNPQRSTUVWXYZ"; 
for (var i = 0; i < iVcodeNum; i++) 
{ 
text2 = text2 + textArray.Substring(random.Next() % textArray.Length, 1); 
} 
return text2;