Location of a file containing the stack policy. The URL must point to a policy (max size: 16KB) located in an S3 bucket in the same region
            as the stack. If you pass StackPolicyBody and StackPolicyURL, only StackPolicyBody is used.
             
            
Constraints:
 Declaration Syntax
 Declaration Syntax| C# | 
public string StackPolicyURL { get; set; }