C# (CSharp) System.Collections.Generic IDictionary.GetValueOrAddNew Beispiele

Beispiel #1

 public static void AddValue <TKey, TValue>
 (
     this IDictionary <TKey, IList <TValue> > dictionary,
     [DisallowNull] TKey key,
     TValue value
 ) => dictionary.GetValueOrAddNew(key, () => new List <TValue>()).Add(value);