Gets and sets the property Key. 
            
The name of the sidecar caption file that you want Elastic Transcoder to include in the output file.
 Declaration Syntax
 Declaration Syntax| C# | 
public string Key { get; set; }
The name of the sidecar caption file that you want Elastic Transcoder to include in the output file.
 Declaration Syntax
 Declaration Syntax| C# | 
public string Key { get; set; }