how to find a string in

I have long string with multi line of text. This text contains
a special tag string with format "PropertyTag[]".
In between "[", "]" any number of characters can come for example

so now  I need to find this string from the long string, could anyone help me out here
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käµfm³d 👽Commented:
Try this:

Imports System.Text.RegularExpressions


Dim m As Match = Regex.Match(input_string, "PropertyTag\[[^\]]+\]")
Dim propTag As String = String.Empty

If m.Success Then
    propTag = m.Value
End If

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Visual Basic.NET

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