using uCalcSoftware;

var uc = new uCalc();
var t = uc.NewTransformer();
t.Text = "This is a test. It is simple.";
t.Pattern("{@Alpha}");
t.Find();

// The second 'is' starts at character position 19
var index = t.Matches.IndexOf(19);

Console.WriteLine($"The match at character 19 is at index: {index}");
Console.WriteLine($"Match content: '{t.Matches[index].Text}'");