...and it makes no sense why. T-T
In my Application_Startup event handler I have code that looks kinda like this:
Application_Startup
private void Applicati
Based on Alexey Ivanov's suggestion, I successfully used a new window as the parent
System.Windows.Forms.MessageBox.Show(new System.Windows.Forms.NativeWindow(), errorMessage, "Application Startup", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);