Adding the CANONICAL tag to my page for SEO through code behind

Question

I am using ASP.NET with MasterPages. Thus i cant just place this link in my pages that reference my MasterPage.

<link rel="canonical" href="http://www.erate.co.za/" />

I need to place this link in though my Page Load of each one of my pages. How would i do this through code? I am using VB.NET but C# will also help me in the right direction.

This is how i did it for my DESCRIPTION tag in my code behind.

    Dim tag As HtmlMeta = New HtmlMeta()
    tag.Name = "description"
    tag.Content = "Find or rate any company in South Africa for FREE and rate them"
    Header.Controls.Add(tag)