The weekly time range (in UTC) during which system maintenance can occur. Note that system maintenance may result in an outage. This change
            is made immediately. If you are moving this window to the current time, there must be at least 120 minutes between the current time and end
            of the window to ensure that pending changes are applied.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public string PreferredMaintenanceWindow { get; set; }