using System;

public class CustomEventExample
{
public event EventHandler<CustomEventArgs> ProcessCompleted;

public void OnProcessCompleted(CustomEventArgs e)
{
ProcessCompleted?.Invoke(this, e);
}

public void Test()
{
OnProcessCompleted(new CustomEventArgs("test"));
}
}


public class CustomEventArgs : EventArgs
{
public object CustomObject { get; set; }

public CustomEventArgs() {}

public CustomEventArgs(object customObject)
{
CustomObject = customObject;
}
}