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Can be moved onto a single line since its a lambda operation.

Code
Diff
  • public class Kumite {
      public static bool IsThree(int x) => x.ToString().Contains('3');
    }
    • public class Kumite {
    • public static bool IsThree(int x) =>
    • x.ToString().Contains('3');
    • public static bool IsThree(int x) => x.ToString().Contains('3');
    • }