OpenTween.TweenMain.CreateSearchComparer C# (CSharp) Method

        private Func<string, bool> CreateSearchComparer(string query, bool useRegex, bool caseSensitive)
        {
            if (useRegex)
            {
                var regexOption = caseSensitive ? RegexOptions.None : RegexOptions.IgnoreCase;
                var regex = new Regex(query, regexOption);

                return x => regex.IsMatch(x);
            }
            else
            {
                var comparisonType = caseSensitive ? StringComparison.CurrentCulture : StringComparison.CurrentCultureIgnoreCase;

                return x => x.IndexOf(query, comparisonType) != -1;
            }
        }