<PackageReference Include="System.Reactive" Version="6.0.2" />

EventPattern<TEventArgs>

public class EventPattern<TEventArgs> : EventPattern<object, TEventArgs>
Represents a .NET event invocation consisting of the weakly typed object that raised the event and the data that was generated by the event.
using System.Runtime.CompilerServices; namespace System.Reactive { [System.Runtime.CompilerServices.NullableContext(1)] [System.Runtime.CompilerServices.Nullable(new byte[] { 0, 1, 1 })] public class EventPattern<[System.Runtime.CompilerServices.Nullable(2)] TEventArgs> : EventPattern<object, TEventArgs> { public EventPattern([System.Runtime.CompilerServices.Nullable(2)] object sender, TEventArgs e) : base(sender, e) { } } }