关于c#的问题,请各位专家解答!

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请写一下这两个问题的程序,另外这是我写的第一问,请帮忙看看需要怎么改

问题一:

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using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int n;
            n = 1;
            for(int a = 0; a <= 100; a++)
            {
                if (0 != a % 3)
                    continue;
                if (0 == a % 5)
                    continue;
                Console.Write(string.Format("{0,5}", a));
                n++;
                if (0 == n % 10)
                    Console.Write("\n");
            }
        }
    }
}

问题二:

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using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            double t = 1, i = 1, pi = 0;
            while (Math.Abs((t / i)) >= Math.Pow(10, -6))
            {
                pi += t / i;
                t = -t;
                i += 2;
            }
            Console.WriteLine("Π={0}", pi * 4);

        }
    }
}

WriteLine本身就换行了,改成Write