The SHA256 tree hash of the entire archive. It is the tree hash of SHA256 tree hash of the individual parts. If the value you specify in the
            request does not match the SHA256 tree hash of the final assembled archive as computed by Amazon Glacier, Amazon Glacier returns an error
            and the request fails.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string Checksum { get; set; }