test.cs

using System.Drawing;
using System.Text.RegularExpressions;
using TXTextControl.DocumentServer.PDF.Contents;

Lines pdfLines = new Lines("invoice.pdf");

List<ContentLine> contentLines =
   pdfLines.Find(new RectangleF(462, 376, 400, 400), true);

foreach (ContentLine line in contentLines)
{
	float fTotal = ExtractFloatFromString(line.Text);

	Console.WriteLine("Found value on page {0} (X: {1}, Y: {2}): {3}",
		line.Page.ToString(),
		line.X.ToString(),
		line.Y.ToString(),
		fTotal.ToString());
}

static float ExtractFloatFromString(string input)
{
	// Regular expression to match a floating-point number
	string pattern = @"[-+]?[0-9]*\.?[0-9]+";

	// Match the pattern in the input string
	Match match = Regex.Match(input, pattern);

	if (match.Success)
	{
		// Convert the matched value to float
		return float.Parse(match.Value);
	}

	// If no match found, return 0.0 or you can throw an exception or handle it as needed
	return 0.0f;
}