Random verification code generation

// Generate a random escape code
Public String createverifycode (INT codelen)
{

// Custom random code string sequence (separated by commas)
String codeserial = ", A, B, C, D, E, F, G, H, I, J, K, L, M, n, O, P, Q, R, S, T, U, V, W, X, Y, Z "; // you can
If (codelen = 0)
{
Codelen = length;
}

String [] arr = codeserial. Split (',');

String code = "";

Int randvalue =-1;

Random Rand = new random (unchecked (INT) datetime. Now. ticks ));

For (INT I = 0; I <codelen; I ++)
{
Randvalue = Rand. Next (0, arr. Length-1 );

Code + = arr [randvalue];
}

Return code;
}