To reproduce: RadMessageBox.Instance.Font = new Font("Segoe UI", 10); foreach (Control c in RadMessageBox.Instance.Controls) { c.Font = new Font("Segoe UI", 14); } RadMessageBox.SetThemeName("TelerikMetro"); RadMessageBox.Show("test", "test2", MessageBoxButtons.YesNoCancel, RadMessageIcon.Error, MessageBoxDefaultButton.Button2); WORKAROUND: use smaller font size
We have added a ButtonSize property which will allow developers to define the size of the buttons of the message box. To access it use the following code: RadMessageBox.Instance.ButtonSize = new Size(150, 30);