Gets or sets the name of a rendering template that can be used in contexts in which the template named by the TemplateName property would be inappropriate.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
The property returns the value of the DefaultAlternateTemplateName property if it has not been specifically set to something else.Notes to callers
Typically, calling code should set the property to the value of the ID attribute of a <RenderingTemplate> element in an .ascx file that is located in the following folder:
%ProgramFiles%\Common Files\Microsoft Shared\web server extensions\15\template\controltemplates
The ID attribute identifies the RenderingTemplate object that renders the control in contexts, such as on particular forms, in which using the template named by the TemplateName property would be inappropriate.