using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace StandardScene.CarTypes { public partial class TextViewer : Form { public TextViewer() { InitializeComponent(); } public void UpdateText(string str) { richTextBox1.Invoke((Action)delegate { richTextBox1.Text = str; }); } } }