using System;

using System.Threading.Tasks;

​

public class Program

{

        Forms.Button button = new Forms.Button();

        Forms.Label label = new Forms.Label();

        Forms.Form form = new Forms.Form();

    public static async void Main()

    {

        var something = sth;

        if(something)

            ShowForm();

    }

    private void ShowForm()

    {

        button.properties;

        label.properies;

        form.properties;

        form.Controls.Add(button);

        form.Controls.Add(label);

        var asyncTask = new System.Threading.Tasks.Task(() => { form.ShowDialog(); });

        asyncTask.Start;

    }

}