using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"Teacher:(?:(?!\bName:).)*\bName: ABC";
string input = @"Teacher: ID: 123 Something: Something Name: ABC Age: 40 Student1: Name: XYZ Age: 12 Student2: Name: ABC
Teacher: Name: EFG Age: 40 Student1: Name: XYZ Age: 12 Student2: Name: ABC";
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