Recursive details table section in Hierarchical Radgrid

Hello All,

I need to add the Details Table section again and again till the result table is empty.

like 

Main Table 

Mcol1 Mcol2 Mcol3

--- DetailsTable

     Dcol1 Dcol2 Dcol3

     --- Dcol1.1 Dcol1.2 Dcol1.3

         ---Dcol2.1 Dcol2.2 Dcol2.3

whats the best way to do these structure, the depth is always depends on the result output.

Many Thanks

Amjath