Toronto picked off the goaltender to try and score an equalizer without success.
Nylander made his way on the right wing and with power he pushed past Dahlin, a duel between two of the biggest Swedish profiles, and spot-kicked the 3-4 goal into the far cross.
However, there was only 1.02 left in the game and time was too short to get any points for Toronto.
Nylander's personal best after eight seasons in the NHL was from last year when he scored 34 goals in 81 games.
It is noteworthy that Nylander played all 66 games in the league this season.
Best Swedish goal scorer in the NHL
Nylander is the best Swedish goal scorer in the NHL and has three goals to his credit over Adrian Kempe and Mika Zibanejad.
Buffalo got an important win and hangs on to a playoff spot.
- We played decently in the first period, but in the second and third we did not get up to normal level at all, says Calle Järnkrok, who scored his fifteenth goal of the season when he scored 2-0 in the first period to the NHL's website.
Toronto lost after the fine start and the coach was not particularly pleased.
- The second period was probably our worst of the entire season, if I'm being honest, says coach Sheldon Keefe.