The basis of the stroke is to go on one knee to a good length or slightly short of length delivery off a fast or medium paced bowler and 'scoop' the ball over the head of the wicket keeper. The ball travels straight towards the boundary behind the wicket keeper.
According to Dilshan he started practising this stroke against a bowling machine during his tenure for Delhi Daredevils at the 2009 Indian Premier League (IPL) held in South Africa between April/May 2009.
There has been much discussion whether the Dilscoop is identical to the Marillier or Paddle scoop. However according to former Australian captain Ian Chappell who was commentating during the above ICC World Twenty20, he had never seen any batsman play the ball straight over the wicket keeper's head as Dilshan does, hence its originality.
While the Dilscoop travels straight over the wicket keeper, the Marilier travels towards fine leg or deep fine leg and the Paddle Scoop preferred by many players including Moin Khan and Misbah-ul-Haq among others is played against a yorker length ball (note the Dilscoop is played against a good length or slightly short of length ball).