using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"The (?:(?!no|never|not).){0,50}? has not fully complied with its obligations under the Prior Undertaking";
string input = @"The City has not fully complied with its obligations under the Prior Undertaking
The School District has not fully complied with its obligations under the Prior Undertaking
The District has not fully complied with its obligations under the Prior Undertaking
The not District has not fully complied with its obligations under the Prior Undertaking";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase;
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