Generate Dyanmic Password using Asp.net

  //This will generate dynamic strong password for you. It can be used in any language..

  protected void btnGenerate_Click(object sender, EventArgs e) 
{ 
    string allowedChars = ""; 
    allowedChars = "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,"; 
    allowedChars += "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,"; 
    allowedChars += "1,2,3,4,5,6,7,8,9,0,!,@,#,$,%,&,?"; 
 
    char[] sep ={ ',' }; 
 
    string[] arr = allowedChars.Split(sep); 
 
    string passwordString = ""; 
 
    string temp = ""; 
 
    Random rand = new Random(); 
 
    for (int i = 0; i < Convert.ToInt32(txtPassLength.Text); i++) 
    { 
        temp = arr[rand.Next(0, arr.Length)]; 
        passwordString += temp; 
    } 
    txtPassword.Text = passwordString; 
}