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());
}