System.Text.RegularExpressions - If else condition on minus sign

//.NET Regex.Match Online Tester: www.systemtextregularexpressions.com

//Namespace
using System.Text.RegularExpressions;

//Regex Pattern
string pattern = @"^(?(-)^-\d{0,11}$|^\d{0,12}$)";

//Regex example #1
Regex r = new Regex(@"^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline);
Match m1 = r.Match("input text");
MatchCollection mc1 = r.Matches("input text");

//Regex example #2
Match m2 = Regex.Match("input text", @"^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline);
MatchCollection mc2 = Regex.Matches("input text", @"^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline);

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'.NET Regex.Match Online Tester: www.systemtextregularexpressions.com

'Namespace
Imports System.Text.RegularExpressions

'Regex Pattern
Dim pattern As String = "^(?(-)^-\d{0,11}$|^\d{0,12}$)"

'Regex example #1
Dim r As Regex = New Regex("^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline)
Dim m1 As Match = r.Match("input text")
Dim mc As MatchCollection = r.Matches("input text")

'Regex example #2
Dim m2 As Match = Regex.Match("input text", "^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline)
Dim mc2 As MatchCollection = Regex.Matches("input text", "^(?(-)^-\d{0,11}$|^\d{0,12}$)", RegexOptions.Multiline)

System.Text.RegularExpressions .NET Regex.Match

If else condition on minus sign

IsMatch=true

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