xml, linq, c#

How to add a new plan if state name = 'NJ' and type name = 'Term Life'? and carrier name = 'Mutual of Omaha' using c#?


plan name="test"
plan id = "123"
plan healthtier="test"

<Products>
	<State Name="NJ">
		<Type Name="Subsidized">
			<Carrier Name="Chip" ID="100000008">
				<Plan Name="Chip" ID="100000322" HealthTier="" />
			</Carrier>
		</Type>
		<Type Name="Term Life">
			<Carrier Name="Mutual of Omaha" ID="100000017">
				<Plan Name="Term Life Express" ID="100000259" HealthTier="" />
		 	</Carrier>
		</Type>
		
	</State>
<State Name="PA"> 
		<Type Name="In Market">
			<Carrier Name="2017 Capital Blue Cross" ID="100000134">
				<Plan Name="Silver PPO 4500/0/10" ID="100002633" HealthTier="Silver" />
		 	</Carrier>
			<Carrier Name="2017 Geisinger Health Plan" ID="100000135">
		 	</Carrier>
		 			
		</Type>
		<Type Name="Out Market">
			<Carrier Name="2017 Capital Blue Cross" ID="100000134">
				<Plan Name="Gold PPO 1000/0/20" ID="100002634" HealthTier="Gold" />
			</Carrier>
			<Carrier Name="2018 Capital Blue Cross" ID="948120063">
				<Plan Name="Gold PPO 1000/0/20" ID="100002634" HealthTier="Gold" />
			</Carrier>  
		</Type> 
		<Type Name="Term Life">
			<Carrier Name="Assurity" ID="100000005">
				<Plan Name="Non-Med Term 350" ID="100000230" HealthTier="" />
			</Carrier> 
		</Type> 
	</State>
</Products>

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