Pure TDD

gistfile1.cs

using System;
          
namespace ChapterOneExample. Utilities
{
    public class StringUtilities
    {
        public int CountOccurences(string stringToCheck,
                                   string stringToFind)
        {
            var stringAsCharArray = stringToCheck. ToCharArray( ) ;
            var stringToCheckForAsChar =
                                      stringToFind. ToCharArray() [ 0] ;
            var occuranceCount = 0;
          
            for (var characterIndex = 0;
                 characterIndex  <  stringAsCharArray. GetUpperBound( 0) ;
                 characterIndex++)
            {
                if (stringAsCharArray[ characterIndex] ==
                                              stringToCheckForAsChar)
                {
                    occuranceCount++;
                }
            }
          
            return occuranceCount;
        }
    }
}