using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[\s](rs|price)?([\s.]*\d+[\s\d.]*)(pkg|k|(?:la(?:c|kh|k)|crore|cr)s?|l)[\s.] ";
string input = @"65 lac this is 55 lac. and more price 100 lac. randome text to test price45 crs. and 65 cr and to test its matching rs 3244 k like rs 55k. to its matchibg 65 cr. but not 65 cr als not matching price 123 lac more of it 55 crs.
";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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