Func<T1, T2, T3, T4, TResult> public sealed delegate Func<T1, T2, T3, T4, TResult> : MulticastDelegate Documentation Code namespace Newtonsoft.Json.Serialization { public delegate TResult Func<T1, T2, T3, T4, TResult> (T1 arg1, T2 arg2, T3 arg3, T4 arg4); }