System.Text.ASCIIEncoding.GetMaxByteCount C# (CSharp) Method

        public override int GetMaxByteCount(int charCount)
        {
            throw null;
        }

 private void DoNegAOORTest(ASCIIEncoding ascii, int charCount)
 {
     Assert.Throws<ArgumentOutOfRangeException>(() =>
     {
         ascii.GetMaxByteCount(charCount);
     });
 }