mono/netcore/System.Private.CoreLib/shared/System/EventHandler.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

namespace System
{
    public delegate void EventHandler(object? sender, EventArgs e);

    public delegate void EventHandler<TEventArgs>(object? sender, TEventArgs e); // Removed TEventArgs constraint post-.NET 4
}