System.Net.Http.Headers.RangeHeaderValue.ToString C# (CSharp) Méthode

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder(_unit);
            sb.Append('=');

            if (_ranges != null)
            {
                bool first = true;
                foreach (RangeItemHeaderValue range in _ranges)
                {
                    if (first)
                    {
                        first = false;
                    }
                    else
                    {
                        sb.Append(", ");
                    }

                    sb.Append(range.From);
                    sb.Append('-');
                    sb.Append(range.To);
                }
            }

            return sb.ToString();
        }

        public void ToString_UseDifferentRanges_AllSerializedCorrectly()
        {
            RangeHeaderValue range = new RangeHeaderValue();
            range.Unit = "myunit";
            range.Ranges.Add(new RangeItemHeaderValue(1, 3));
            Assert.Equal("myunit=1-3", range.ToString());

            range.Ranges.Add(new RangeItemHeaderValue(5, null));
            range.Ranges.Add(new RangeItemHeaderValue(null, 17));
            Assert.Equal("myunit=1-3, 5-, -17", range.ToString());
        }