Get string between two strings in a string

Question

I have a string like:

\"super exemple of string key : text I want to keep - end of my string\"

I want to just keep the string which is betw

Answer 1

If you want to handle multiple occurrences of substring pairs, it won't be easy without RegEx:

Regex.Matches(input ?? String.Empty, "(?=key : )(.*)(?<= - )", RegexOptions.Singleline);

• input ?? String.Empty avoids argument null exception
• ?= keeps 1st substring and ?<= keeps 2nd substring
• RegexOptions.Singleline allows newline between substring pair

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If order & occurrence count of substrings doesn't matter, this quick & dirty one may be an option:

var parts = input?.Split(new string[] { "key : ", " - " }, StringSplitOptions.None);
string result = parts?.Length >= 3 ? result[1] : input;

At least it avoids most exceptions, by returning the original string if none/single substring match.