How to Compare tables in c#

Question

Hlo Frnds 

I have 2 tables Machine name is 1st table

 

 

 

Criticality Level is 2nd Table

 

 

I need to Show the value.. if criticality of the machine is 5 minimum skill level is 4 so I need to compare with 1st table and show only who will be having Criticality level 5 or Minimum Skill level 4 that less than that skill level for 1 machine it should not show