how to load repeater in master page in asp.net

Question

how to load repeater in master page in asp.net (i got error null refeerence exception)

 

var imagepath = jsonresult.Thumbs.ToList();

DataList1.DataSource = imagepath;(here iam getting error i got result in imagepath)

DataList1.DataBind();

 

but same time I got error.  I created default page with reference of master page I ran default.aspx page

 

but ima getting error in master page ..please guide me