C# 验证码一例(随机数字加字母)

//生成验证码
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;