using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[+]\d{12}|\b(\d{11}|(\d{3}[ ])?\d{4}[- ]?\d{4})\b";
string substitution = @"";
string input = @"97845448
9784-5448
04197845448
+554197845448
041 9784 5448";
Regex regex = new Regex(pattern);
string result = regex.Replace(input, substitution);
}
}
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