<PackageReference Include="Microsoft.Net.Http" Version="2.2.15" />

System.Net.Http.Headers.HttpRequestHeaders

public sealed class HttpRequestHeaders : HttpHeaders
Represents the collection of Request Headers as defined in RFC 2616.
public HttpHeaderValueCollection<MediaTypeWithQualityHeaderValue> Accept { get; }

public HttpHeaderValueCollection<StringWithQualityHeaderValue> AcceptCharset { get; }

public HttpHeaderValueCollection<StringWithQualityHeaderValue> AcceptEncoding { get; }

public HttpHeaderValueCollection<StringWithQualityHeaderValue> AcceptLanguage { get; }

public AuthenticationHeaderValue Authorization { get; set; }

public CacheControlHeaderValue CacheControl { get; set; }

public HttpHeaderValueCollection<string> Connection { get; }

public bool? ConnectionClose { get; set; }

public DateTimeOffset? Date { get; set; }

public HttpHeaderValueCollection<NameValueWithParametersHeaderValue> Expect { get; }

public bool? ExpectContinue { get; set; }

public string From { get; set; }

public string Host { get; set; }

public HttpHeaderValueCollection<EntityTagHeaderValue> IfMatch { get; }

public DateTimeOffset? IfModifiedSince { get; set; }

public HttpHeaderValueCollection<EntityTagHeaderValue> IfNoneMatch { get; }

public RangeConditionHeaderValue IfRange { get; set; }

public DateTimeOffset? IfUnmodifiedSince { get; set; }

public int? MaxForwards { get; set; }

public HttpHeaderValueCollection<NameValueHeaderValue> Pragma { get; }

public AuthenticationHeaderValue ProxyAuthorization { get; set; }

public RangeHeaderValue Range { get; set; }

public Uri Referrer { get; set; }

public HttpHeaderValueCollection<TransferCodingWithQualityHeaderValue> TE { get; }

public HttpHeaderValueCollection<string> Trailer { get; }

public HttpHeaderValueCollection<TransferCodingHeaderValue> TransferEncoding { get; }

public bool? TransferEncodingChunked { get; set; }

public HttpHeaderValueCollection<ProductHeaderValue> Upgrade { get; }

public HttpHeaderValueCollection<ProductInfoHeaderValue> UserAgent { get; }

public HttpHeaderValueCollection<ViaHeaderValue> Via { get; }

public HttpHeaderValueCollection<WarningHeaderValue> Warning { get; }