looking-for-words-in-parentheses

We will learn about how to get words or character inside of parentheses in C#
IndexOf() gives you the first position of a character or string inside of another string.
IndexOf() returns -1 if it can't find a match.
Substring() returns just the specified portion of a string, using a starting position and optional length.

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Example:

string message = "Find what is (inside the parentheses)";

int openingPosition = message.IndexOf('(');
int closingPosition = message.IndexOf(')');

openingPosition += 1;

int length = closingPosition - openingPosition;
Console.WriteLine(message.Substring(openingPosition, length));

That code will return output like this: inside the parentheses

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We can use the IndexOfAny() method to find the first location of any of the string from selected array.
And we can also use LastIndexOf() to find the final location of a string within another string.
Source: https://learn.microsoft.com/id-id/training/modules/csharp-modify-content/2-exercise-indexof-substring