Dynamically Render user control into panel content section

I have a user control contains ASP.net controls,
I want to render this control inside ext.net panel in the content section

The following is the code i used, but it seems there is a problem in rendering the user control inside panel content :

Code:

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                Ext.Net.Panel oPanel = new Ext.Net.Panel();
                oPanel.ID = "Test1";
                oPanel.Height = 100;

                ITEC_Hijri oITEC_Hijri = new ITEC_Hijri();
                oITEC_Hijri.ID = "ITEC_Hijri1";

                oPanel.ContentContainer.Controls.Add(oITEC_Hijri);
                oPanel.Render(pnlBuildForm1, 0, RenderMode.InsertTo);
               
                ResourceManager1.Controls.Add(oPanel);


                oPanel = new Ext.Net.Panel();
                oPanel.ID = "Test2";
                oPanel.Height = 100;

                oITEC_Hijri = new ITEC_Hijri();
                oITEC_Hijri.ID = "ITEC_Hijri2";

                oPanel.ContentContainer.Controls.Add(oITEC_Hijri);
                oPanel.Render(pnlBuildForm2, 0, RenderMode.InsertTo);
                ResourceManager1.Controls.Add(oPanel);

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Hi @ITECH-Developer,

Do you render it during a DirectEvent/DirectMethod?

Here is an example.
https://examples2.ext.net/#/XRender/...UpdateContent/