Hi rfresh,
I found solution for your query, try the below code it's working for me.
TabPage dashboardTabPage = new TabPage("Dashboard Summary");
TabControl maintc = new TabControl();
maintc.Anchor = (AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right);
maintc.TabPages.Add(dashboardTabPage);
this.Controls.AddRange(new Control[] { maintc });
TabPage syncJobTabPage = new TabPage("syncJobTitle");
maintc.TabPages.Add(syncJobTabPage);
TabPage destinationTabPage = new TabPage("Destination");
TabControl tcSync = new TabControl();
tcSync.Anchor = (AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right);
tcSync.TabPages.Add(destinationTabPage);
this.Controls.AddRange(new Control[] { tcSync });
syncJobTabPage.Controls.Add(tcSync);
i hope this will help you.
Thank's
Mohan G