I need regex patterns for following floating point numbers. thanx in advance

the regex pattern for this would be simple

\d{1,2}.\d{1,2}

seems you are holding it in a string, you need to add \b at start and end as updated below.

I have tried following code and it worked as expected

string STR = "10.01,11.11,111.11,1.1,1.11,222.222,22.222";
string[] lines = STR.Split(',');
Regex regex = new Regex(@"\b\d{1,2}\.\d{1,2}\b");
foreach (string line in lines)
{
    Match match = regex.Match(line.Trim());
    if (match.Success)
    {
        Console.WriteLine(line);
    }
}

Hope that helps. If it does, mark the answer as solution and/or upvote.
-Milind