<PackageReference Include="NETStandard.Library" Version="2.0.0" />

System.Net.Http.Headers.StringWithQualityHeaderValue

namespace System.Net.Http.Headers { public class StringWithQualityHeaderValue : ICloneable { public double? Quality { get; } public string Value { get; } public StringWithQualityHeaderValue(string value); public StringWithQualityHeaderValue(string value, double quality); public static StringWithQualityHeaderValue Parse(string input); public static bool TryParse(string input, out StringWithQualityHeaderValue parsedValue); } }