<PackageReference Include="NETStandard.Library" Version="2.0.0-preview2-25401-01" />

System.Collections.Specialized.StringDictionary

public class StringDictionary : IEnumerable
public virtual int Count { get; }

public virtual bool IsSynchronized { get; }

public virtual string this[string key] { get; set; }

public virtual ICollection Keys { get; }

public virtual object SyncRoot { get; }

public virtual ICollection Values { get; }

public virtual void Add(string key, string value)

public virtual void Clear()

public virtual bool ContainsKey(string key)

public virtual bool ContainsValue(string value)

public virtual void CopyTo(Array array, int index)

public virtual IEnumerator GetEnumerator()

public virtual void Remove(string key)