using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^ERROR on (?:(?!Network connection reset).)*$";
string input = @"ERROR on Server1: Network connection reset.
DETAIL: The client is gone.
ERROR on Server2: Network connection reset.
DETAIL: The client is gone.
ERROR on Server1: Network connection reset.
DETAIL: The client is gone.
ERROR on Server1: Null Pointer Error.
DETAIL: Object 'Cart' does not exists.
STACKTRACE:
at UpdateCart function
at AddProducttoCart function
ERROR on Server2: Network connection reset.
DETAIL: The client is gone.
ERROR on Server2: IO Error
DETAIL: The resource on URL (www.example.com/data.xls) does not exists.
ERROR on Server2: Network connection reset.
DETAIL: The client is gone.";
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