Solved Whats wrong with this code?

I know this is weird, i'm making a VIP code activation thingy. When i save it, a message pops up in red on the console saying "Error while compiling: test.cs(36,33): error CS1503: Argument `#1' cannot convert `string' expression to type `int'" I don't know how to fix this.
"
This is the part of code i'm getting errors at,

Code:

[ChatCommand("activate")]
        private void Activate(BasePlayer plr, string command, string[] args)
        {            SendReply(plr, "Trying to activate...");
           ---> string secondargs = args[0].ToString();
            if (!Codes.Contains(secondargs))
                {
                SendReply(plr, "That code is invalid! Please try again.");
            }
            else
            {
                rust.RunServerCommand("oxide.usergroup add " + plr.displayName + " vip");
                rust.BroadcastChat("Welcome " + plr.displayName + " to the VIP crew!");
                SendReply(plr, "Success! Remember, you get a vip kit which you can redeem via /kit vip.");
            }
        }

Also, i'm new to all of this, so i don't know what methods to use. Thanks.

 

I assume the Codes is List<int>, in which case you have to convert the string secondargs to int by using

Code:

int num = int.Parse(secondargs);

but since the player is expected to input a number he probably wont do that so I suggest using this

Code:

int num;
if (!int.TryParse(secondargs, out num))
{
      SendReply(plr, "Invalid number " + secondargs);
      return;
}

Edit: This applies just in case the Codes is int list

 

Thanks so much! I know where i messed up at, i forgot that it was an integer list. Lol, thanks!