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How can I replace the string, e.g. "A1 (value)" and return me "value" ?

You can use RegularExpression : 

  dim RR = "A1 (value) ... (other value)" dim pattern = "\ (([^)] *) \" slow rijks = new system. Text. Regular Expression Reggae (pattern, system text. RegularExpressions.RegexOptions.Compiled) slow firstBracket = regex.Match (str) if firstBracket.Value.Length & lt; & Gt; 0 then 'free' bronchitis = first bracket.value Substrings (1, first bracket.value.length - 2) 'value' end if

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