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

System.Collections.Generic.IReadOnlyDictionary<TKey, TValue>

public interface IReadOnlyDictionary<TKey, TValue> : IEnumerable<KeyValuePair<TKey, TValue>>, IEnumerable, IReadOnlyCollection<KeyValuePair<TKey, TValue>>
namespace System.Collections.Generic { public interface IReadOnlyDictionary<TKey, TValue> : IEnumerable<KeyValuePair<TKey, TValue>>, IEnumerable, IReadOnlyCollection<KeyValuePair<TKey, TValue>> { TValue this[TKey key] { get; } IEnumerable<TKey> Keys { get; } IEnumerable<TValue> Values { get; } bool ContainsKey(TKey key); bool TryGetValue(TKey key, out TValue value); } }