SewingFactory/DllLeven/CheckPass.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace DLLCheck
{
    public class CheckPass
    {
        public bool ClassCheckPass(string pass)
        {
            if(pass.Length < 6)
                return false;
            int countUp = 0, countLow = 0;
            for (int i = 0; i < pass.Length; i++)
            {
                if (char.IsLower(pass[i]))
                    countLow++;
                if (char.IsUpper(pass[i]))
                    countUp++;
            }
            if(countUp == 0 || countLow == 0)
                return false;
            int countNum = 0;
            for (int i = 0; i < pass.Length; i++)
                if (char.IsDigit(pass[i]))
                    countNum++;
            if(countNum > pass.Length / 2)
                return false;
            int countSim = 0;
            for (int i = 0; i < pass.Length; i++)
                if ("!@#$%^".Contains(pass[i]))
                    countSim++;
            if(countSim == 0)
                return false;
            return true;
        }
    }
}