reportviewer not shown on form designer (c# winform)

For those that didn't have the ReportViewer control in the Toolbox so they followed the instructions and added the control manually -- if you don't see the ReportViewer control after dragging the (now available) ReportViewer control, then right click on References in your project structure, then browse to the exact same location from where you took the ....WinForm.dll or WebForm.dll and this time choose ...Designer.dll.

Rebuild your project and try dragging again. This time the control should be visible on the form.

I found a workaround

this line Manual added this.Controls.Add(this.reportViewer1);

on method InitializeComponent

Why when Drag-drop control on the Windows Forms

Not added automatic

P.s Sorry for my english

I had the same problem as you and I solved it by updating the dll Windows.ReportViewer.Winform (version 10.0) to (version 11.0) with Nuget.

install version 11.0.3452. It's working for me. enter image description here.