C#: finding instances of a string within a string

Question

Suppose I had the string \"1 AND 2 AND 3 OR 4\", and want to create an array of strings that contains all substrings \"AND\" or \"OR\", in order, found within the string.

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Answer 1

Your probably looking for a tokeniser or Lexer, have a look at the following article:

C# Regular Expression Recipes—A Better Tokenizer