public void ContentLength_UseAddMethod_AddedValueCanBeRetrievedUsingProperty()
{
_headers = new HttpContentHeaders(new ComputeLengthHttpContent(() => { throw new ShouldNotBeInvokedException(); }));
_headers.TryAddWithoutValidation(HttpKnownHeaderNames.ContentLength, " 68 \r\n ");
Assert.Equal(68, _headers.ContentLength);
}