Question

This is a sample code I wrote to add some tab pages with the controls in them at run time. but when I run it , I get a Null Ref exception error.
what part I am doing wrong?

TabPage[] tabPages = new TabPage[2];
CheckBox ck = new CheckBox();
tabPages[0].BackColor = Color.Firebrick;
tabPages[0].Controls.Add(ck);
tabPages[1].BackColor = Color.Firebrick;
tabPages[1].Controls.Add(ck);
tabGuy.SuspendLayout();
tabGuy.TabPages.Add(tabPages[0]);
tabGuy.TabPages.Add(tabPages[1]);
tabGuy.ResumeLayout(); 

Answer 1

You’re missing tabPages[0] = new TabPage() and tabPages[1] = new TabPage() before any assignment. Creating an array assigns every of its elements to its default value, that is null for any reference type.