Newtonsoft.Json StringUtils

StringUtils.cs

Newtonsoft.Json StringUtils line 353

public static TSource ForgivingCaseSensitiveFind<TSource>(this IEnumerable<TSource> source, Func<TSource, string> valueSelector, string testValue)
    {
      if (source == null)
        throw new ArgumentNullException("source");
      if (valueSelector == null)
        throw new ArgumentNullException("valueSelector");

      var caseInsensitiveResults = source.Where(s => string.Compare(valueSelector(s), testValue, StringComparison.OrdinalIgnoreCase) == 0);
      if (caseInsensitiveResults.Count() <= 1)
      {
        return caseInsensitiveResults.SingleOrDefault();
      }
      else
      {
        // multiple results returned. now filter using case sensitivity
        var caseSensitiveResults = source.Where(s => string.Compare(valueSelector(s), testValue, StringComparison.Ordinal) == 0);
        return caseSensitiveResults.SingleOrDefault();
      }
    }