Error:cannot convert 'Command.CommandType' to'System.Data.CommandType'

[doanminhchau]

 public class Command
    {
        private IPAddress senderIP;
        public IPAddress SenderIP
        {
            get { return senderIP; }
            set { senderIP = value; }
        }

        private CommandType cmdType;
        public CommandType CommandType
        {
            get { return cmdType; }
            set { cmdType = value; }
        }

        private string commandBody;
        public string MetaData
        {
            get { return commandBody; }
            set { commandBody = value; }
        }
        // 2 contructor 
        public Command(CommandType type, IPAddress targetMachine, string metaData)
        {
            this.cmdType = type;
            this.target = targetMachine;
            this.commandBody = metaData;
        }
        public Command(CommandType type, IPAddress targetMachine)
        {
            this.cmdType = type;
            this.target = targetMachine;
            this.commandBody = "";
        }
    }

This is the code i wrote in the my class: Command.cs.
Thanks for any help