How to add code to SharePoint 2010 master page

[admin]

I have created custom master page with custom elements included according to this link: <a href="http://msdn.microsoft.com/en-us/library/gg447066.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/gg447066.aspx</a>

I want to have a Suggestions form in header area where users can leave their comments/suggestions on what functionality they would like to have.

For example:

<ul>
<li>User goes to company team site and notes that it would be great to have a clock on it</li>
<li>User fills the Suggestions form and the suggestion is emailed to me</li>
<li>Now I decide will I implement/develop it or not</li>
</ul>

I have placed all html elements and now I need code implementation. My question is: "How to code html elements to achieve desired functionality?".

Tried to follow up through this solution to add code behind masterpage: <a href="http://rburgundy.wordpress.com/2010...om-masterpage-with-code-behind-file-–-part-2/" rel="nofollow">http://rburgundy.wordpress.com/2010...om-masterpage-with-code-behind-file-–-part-2/</a>
but I get an error which I don't know how to handle.
Here is the error:

<blockquote>
Parser Error Description: An error occurred during the parsing of a
resource required to service this request. Please review the following
specific parse error details and modify your source file
appropriately. Parser Error Message: Could not load the assembly
'Branding102, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=84d1d0117dd4046d'. Make sure that it is compiled before
accessing the page.
Source Error: Line 1:


</blockquote>

I need to implement

_starter.cs

file as code-behind masterpage.