Error in running master pages

I am trying to compile simple master page but i keep on getting following error.
please help!





Compiler Error Message: CS0426: The type name 'child' does not exist in the type 'System.Web.UI.MasterPage'

Source Error:



Line 140: }
Line 141:
Line 142: [TemplateContainer(typeof(MasterPage.child))]
Line 143: [TemplateInstanceAttribute(System.Web.UI.TemplateInstance.Single)]
Line 144: public virtual System.Web.UI.ITemplate Template_head {


...