Calcul in datagridview c#

Question

 

HI SC TEAM

 

I'M BEGINNER IN C#

 

I HAVE THIS GIRDE I WANT THIS :

if C1 = 0 :

C2 AND C3 VALEUR OF EACH ROW MUST BE IN C5 AND IF C2 IS NULL C3 MUST HAVE A VALUE AND IF C3 IS NULL C2 MUST HAVE VALUE

 

IF C1 = 1

 C2 AND C3 VALEUR OF EACH ROW MUST BE IN C4 AND IF C2 IS NULL C3 MUST HAVE A VALUE AND IF C3 IS NULL C2 MUST HAVE VALUE