How can I use/call these methods in my class?

I have the class below.

I have another class that inherits from  above:

public class JobData: NewBlanceJobSiteDataContext
   {
            ....
   }


How can I use those "partial Extensibility methods" in my JobData class?? Or i just cant call/use those methods?

public partial class JobSiteDataContext : System.Data.Linq.DataContext
	{
		
		private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource();
		
    #region Extensibility Method Definitions
    partial void OnCreated();
    partial void InsertHRJobPostings(HRJobPostings instance);
    partial void UpdateHRJobPostings(HRJobPostings instance);
    partial void DeleteHRJobPostings(HRJobPostings instance);
    #endregion

...

}

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