The base class includes the field 'newsControl1', but its type (NewsControl) is not compatible with the type of control (ASP.News_ascx).
more details:

System.Web
   at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildFieldDeclaration(ControlBuilder builder, Boolean fGeneratedID)
   at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse)
   at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse)
   at System.Web.Compilation.BaseTemplateCodeDomTreeGenerator.BuildSourceDataTreeFromBuilder(ControlBuilder builder, Boolean fInTemplate, Boolean topLevelControlInTemplate, PropertyEntry pse)
   at System.Web.Compilation.TemplateControlCodeDomTreeGenerator.BuildMiscClassMembers()
   at System.Web.Compilation.PageCodeDomTreeGenerator.BuildMiscClassMembers()
   at System.Web.Compilation.BaseCodeDomTreeGenerator.BuildSourceDataTree()
   at System.Web.Compilation.BaseCodeDomTreeGenerator.GetCodeDomTree(CodeDomProvider codeDomProvider, StringResourceBuilder stringResourceBuilder, String virtualPath)
   at System.Web.Compilation.BaseTemplateBuildProvider.GenerateCode(AssemblyBuilder assemblyBuilder)
   at System.Web.Compilation.AssemblyBuilder.AddBuildProvider(BuildProvider buildProvider)