How Can I Create Browser Like "Create New Tab" And Add Controls To It At Runtime In Windows Forms Application In C#

Dynamically creating a new tab in a TabControl is pretty simple.

Here is some code to put in your button_Click() :

// Instanciate a TabPage
TabPage myTab = new TabPage("My TabPage");
            
// If you want to create your controls manually, then here we go...
Label myLabel = new Label();
myLabel.Text = "This is a label";

// Add your controls in it
myTab.Controls.Add(myLabel);

// Don't forget to add your TabPage in the TabPageCollection
tabControl1.TabPages.Add(myTab);

This is kinda weird to instantiate your controls manually though, you may want to create a UserControl instead.
After created your UserControl, you can easily add it to your TabPage the same way :

myTab.Controls.Add(new MyUserControl());

If you create your controls manually, you should know how to populate them, however, if you decide to use a UserControl, pass an ID or an entity as a parameter to your UserControl constructor and populate it.