Traverse array again and print all pairs with difference as minDiff .
for ( int i = 1 ; i < n ; i ++ ) { if ( ( arr [ i ] - arr [ i - 1 ] ) == minDiff ) { Console . Write ( " ▁ ( " + arr [ i - 1 ] + " , ▁ " + arr [ i ] + " ) , ▁ " ) ; } } }