Flipping a bit, C#

Language: Layout:

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string Input="10110101101";
            char []inp=new char[Input.Length];
            int i=0;
            foreach(char x in Input)
            {
                inp[i]=x;
                i++;
            }
            Console.WriteLine(inp);
            int inpt=3,inpt2=4;
            int counter=0;
            for(int j=1;j<=inp.Length;j++)
            {
                    if(j%inpt==0)
                    {
                       // Console.WriteLine(inp[j]);
                        char flipvalue='0';
                        if(inp[j]=='0')
                            flipvalue='1';
                       
                         Console.WriteLine(flipvalue);
                        inp[j]=flipvalue;
                        counter++;
                    }
                  if(j%inpt2==0)
                    {
                       // Console.WriteLine(inp[j]);
                        char flipvalue='0';
                        if(inp[j]=='0')
                            flipvalue='1';
                        Console.WriteLine(flipvalue);
                        inp[j]=flipvalue;
                        counter++;
                    }
                if(j%inpt2==0 && j%inpt==0)
                    counter++;
            }
             Console.WriteLine(inp);
             Console.WriteLine(counter);
           
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,08 sec, cpu time: 0,08 sec, average memory usage: 13 Mb, average nr of threads: 3