Gets or sets the KeyPrefix property.  As object keys are generated for the
            	files being uploaded this value will prefix the key.  This is useful when a directory
            	needs to be uploaded into sub directory in the S3 Bucket.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string KeyPrefix { get; set; }
 Value
 Value
            	The directory where files are uploaded from.