Location of file containing the template body. The URL must point to a template located in an S3 bucket in the same region as the stack. For
            more information, go to Template Anatomy
            in the AWS CloudFormation User Guide. Conditional: You must pass TemplateURL or TemplateBody. If both are passed, only
            TemplateBody is used.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string TemplateURL { get; set; }