Filtering Uppercase Words

static void Main(string[] args)
{
  
    var words = FilteringWords("HELLO this IS an EXAMLPLE for LINQ upper CASE");
    foreach (string str in words)
        Console.WriteLine(str);
    Console.ReadLine();
}

static IEnumerable<string> FilteringWords(string str)
{           
    var uppercase=  str.Split(' ')
                .Where(s => String.Equals(s, s.ToUpper(),
                            StringComparison.Ordinal));

    return uppercase;

}