using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\d+(?:\.\d+)?(?:(?:x\d+(?:\.\d+)?)*)?(?=[ \t]+[cm]m)";
string substitution = @"\1 [[replacement]]";
string input = @"The study reveals a speculated nodule with pleural tagging at anterior basal segment of LLL, measured 1.9x1.4x2.0 cm in size
Other two ill defined, small ground glass lesions measured 4.0 mm and 3 mm in size, respectively.
The study reveals a speculated nodule with pleural tagging at anterior basal segment of LLL, measured 1.9x1.4x2.0 cm in size
Other two ill defined, small ground glass lesions measured 4.0 mm and 3 mm in size, respectively.";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx