<PackageReference Include="Microsoft.Net.Http" Version="2.2.28" />

System.Net.Http.Headers.HttpHeaderValueCollection<T>

Represents a collection of header values.
public int Count { get; }

public bool IsReadOnly { get; }

public void Add(T item)

public void Clear()

public bool Contains(T item)

public void CopyTo(T[] array, int arrayIndex)

public void ParseAdd(string input)

public bool Remove(T item)

public bool TryParseAdd(string input)