Building dynamic Regex in C# [duplicate]

Question

I use dynamically built regex. Problem is when symbol = "aaaa (1)" because regex tries to parse it, but I want to treat it literary

Regex regex = new Regex(@"(^" + "/(" + symbol + @" \(\d+\)$)|" + symbol);

Answer 1

You need to escape special chars:

var escapedSymbol = Regex.Escape(symbol);
Regex regex = new Regex(@"(^" + "/(" + escapedSymbol  + @" \(\d+\)$)|" + escapedSymbol );

Reffer: msdn