Create a function to make a dictionary of brute force of 4 rows and keep it all in one file. An example of brute force:

yyyy 
aaab 
aaac 
aaad 
AAAE 
.. 
.. 
.. 
zzzy 
zzzz

My Solutions Resources should not be the fastest. The recursion for the whole chain comes in 3 lines but for a specific number of characters is a little more complicated. In this case my code allows them to specify the number of characters to combine with all the characters of an array of char. The builder asks you to file to create (or save) the index, which is the amount of characters and finally to combine an array of characters as a reference. Special thanks to cousin William UH, because without it had not clarified some of combinatorial problems in general.

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace ECDundy.Programmer
{
    class ECDundy_Combinatorial
    {
        static void Main(string[] args)
        {...

Here causing some big problems in algorithms and operations. To show he made a code of evidence with which may observe the different branches of this problem in the strict compilation of c #.

List<object> objects = new List<object>();
 objects.Add(int.MaxValue+1); 
 //Error! Compile: "The operation overflows at compile time in checked mode"
 objects.Add(2147483647 + 1); 
 //Error! Compile: "The operation overflows at compile time in checked mode"         
 //Where 2147483647==int.MaxValue==Int32.MaxValue;
 objects.Add(Int32.MaxValue + 1);
 //Error! Compile: "The operation overflows at compile time in checked mode"
 objects.Add(Int64.MaxValue + 1);
 //Error! Compile: "The operation overflows at compile time in checked mode"
 //Where 9223372036854775807==int64.maxvalue; 
 objects.Add(9223372036854775807 + 1);
 //Error! Compile: "The operation overflows at compile time in checked mode"
 objects.Add(Int16.MaxValue + 9223372036854775808 );...