ArcGIS version not specified. You must call RuntimeManager.Bind before creating any ArcGIS components.

解决方式：

打开program.cs

把

ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop);

这句放到

Application.SetCompatibleTextRenderingDefault(false);

和

Application.Run(new Form1());  之间应该就好了