Example of showing a modal and waiting for a result

SomeDialog.razor

<Morris.Blazor.Web.Modal.Modal Visible=@IsVisible title="Invite a user" aria-title="Invite a user">
      <div class="card p-3 shadow">
          <main>
              <div class="modal-content">
                  <div class="modal-header card-header pb-2">
                      <h1 class="modal-title lead font-weight-bold" tabindex="-1">Invite a user</h1>
                  </div>
                  <div class="modal-body p-3">
                  </div>
                  <div class="modal-footer card-footer">
                    <button @onclick=OKClicked>OK</button>
                    <button @onclick=CancelClicked>Cancel</button>
                  </div>
              </div>
          </main>
      </div>
</Morris.Blazor.Web.Modal.Modal>

// Code 

public partial class Create
{
    private bool IsVisible;
    // Use TaskCompletionSource<T> to return a specific type of value
    private TaskCompletionSource<bool> TaskCompletionSource = new();

    public Task ShowAsync()
    {
        TaskCompletionSource = new TaskCompletionSource<bool>();
        IsVisible = true;
        StateHasChanged();
        return TaskCompletionSource.Task;
    }

    private void OKClicked()
    {
        IsVisible = false;
        TaskCompletionSource.SetResult(true);
    }

    private void CancelClicked()
    {
        IsVisible = false;
        TaskCompletionSource.SetResult(false);
    }
}