using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:
0
(?:
x [a-fA-F0-9] (?: _? [a-fA-F0-9] )*
|
[0-7] (?: _? [0-7] )*
|
[bB] [01] (?: _? [01] )*
)?
|
-?
[1-9] (?: _? [0-9] )*
)
[lL]?";
string input = @"";
RegexOptions options = RegexOptions.IgnorePatternWhitespace;
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