Q:

CS0120: An object reference is required for the non-static field, method, or property 'System.Web.UI.Control.Controls.get'

I know there have been a lot of questions regarding this subject but none seem to help me in my situation so I'm posting another. 
I was given a project and asked to split the project out into separate controls.   Originally there was a folder in the project called "events" that referenced a control called "EventsRssFeedControl".   My boss asked me to separate the events and EventsRssFeedControl and put them together in their own project.   So I did that.   I changed all the namespaces and got everything to compile.   But when I try to navigate there, I get an error. 
Description: An error occurred during the compilation of a resource required to service this request.  Please review the following specific error details and modify your source code appropriately. 
Compiler Error Message: CS0120: An object reference is required for the non-static field, method, or property 'System.Web.UI.Control.Controls.get'
Source Error:
<input type="hidden" name="selectedDate" value="<%= UMNEventsRssFeedControl. Controls. UMNEventsRssFeedControl. SelectedDateStr %>"/>

My code looks like this and I'm confused by calling it "non-static" and more confused as to why it doesn't work.   
        private static string _selectedDateStr;
    public static string SelectedDateStr
    {
        get { return _selectedDateStr; }
        set { _selectedDateStr = value; }
    }

It works in the old project and the only things changed were the namespaces and the calls to the new namespace. 

A:

Your namespace and class are named the same thing.  Don't do that.