Current count: @currentCount

<button type="button" class="btn btn-primary" @onclick="IncrementCount">Click me

@code { private int currentCount = 0;

[Parameter]
public int InitialValue { get; set; }

[Parameter]
public EventCallback<int> currentCountChanged{ get; set; }

[Parameter]
public Action OnClickNew { get; set; }


private void IncrementCount() {

    currentCount++;

    currentCountChanged.InvokeAsync(currentCount);
}

protected override void OnParametersSet()
{
    currentCount = InitialValue;
}

}