Creating a Dialog Box Dynamically in C#

public static int ShowDialog(string text, string caption)

        {

            Form prompt = new Form();

            prompt.Width = 500;

            prompt.Height = 100;

            prompt.Text = caption;

            Label textLabel = new Label() { Left = 50, Top=20, Text=text };

            NumericUpDown inputBox = new NumericUpDown () { Left = 50, Top=50, Width=400 };

            Button confirmation = new Button() { Text = "Ok", Left=350, Width=100, Top=70 };

            confirmation.Click += (sender, e) => { prompt.Close(); };

            prompt.Controls.Add(confirmation);

            prompt.Controls.Add(textLabel);

            prompt.Controls.Add(inputBox);

            prompt.ShowDialog();

            return (int)inputBox.Value;

        }

It can be tested by calling

int promptValue = Prompt.ShowDialog("Test", "123");