System.Security.Util.StringExpressionSet.StringSubsetStringPathDiscovery C# (CSharp) Method

        protected static bool StringSubsetStringPathDiscovery( String left, String right, bool ignoreCase )
        {
            StringComparison strComp = (ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal);
            if (right == null || left == null || right.Length == 0 || left.Length == 0)
            {
                return false;
            }
            else if (right.Length == left.Length)
            {
                // if they are equal in length, just do a normal compare
                return String.Compare( right, left, strComp) == 0;
            }
            else
            {
                String shortString, longString;

                if (right.Length < left.Length)
                {
                    shortString = right;
                    longString = left;
                }
                else
                {
                    shortString = left;
                    longString = right;
                }

                if (String.Compare( shortString, 0, longString, 0, shortString.Length, strComp) != 0)
                {
                    return false;
                }

#if !PLATFORM_UNIX
                if (shortString.Length == 3 &&
                    shortString.EndsWith( ":\\", StringComparison.Ordinal ) &&
                    ((shortString[0] >= 'A' && shortString[0] <= 'Z') ||
                    (shortString[0] >= 'a' && shortString[0] <= 'z')))
#else
                if (shortString.Length == 1 && shortString[0]== m_directorySeparator)
#endif // !PLATFORM_UNIX
                     return true;

                return longString[shortString.Length] == m_directorySeparator;
            }
        }

 private static bool StringSubsetStringExpressionPathDiscovery(string left, StringExpressionSet right, bool ignoreCase)
 {
     for (int i = 0; i < right.m_list.Count; i++)
     {
         if (StringExpressionSet.StringSubsetStringPathDiscovery(left, (string)right.m_list[i], ignoreCase))
         {
             return(true);
         }
     }
     return(false);
 }