Wickremesinghe, 66, who will be sworn in as new Prime Minister tomorrow, said he will continue the mandate for good governance given in parliamentary polls and work together with all parties in a national government for 2-3 years.
"The parliamentary elections of August 17 confirms the January 8 revolution," he said, referring to the presidential election held in January in which President Rajapaksa had lost.
"I have got a mandate to put our plan before Parliament, so that we could arrive at a consensus and build a national framework within which we will do our politics," he said, striking a reconciliatory note.
"Through this approach ... All parties could work together either in government holding a ministerial position or in Parliament through the oversight committees."
Wickremesinghe's United National Party (UNP) coalition won 106 seats in Monday's parliamentary election, just 7 short of a simple majority in the 225-member assembly but enough to form a government.
The veteran reformist was handpicked by President Maithripala Sirisena to lead a minority government after the longtime president Rajapaksa was defeated in January elections.
Rajapaksa, 69, contested the parliamentary elections held on Monday to return to the power as prime minister.
A group of Sirisena supporters is likely to join a broad- based national unity government led by Wickremesinghe.
Wickremesinghe became prime minister for the first time in May 1993, when a suicide bomber assassinated president Ranasinghe Premadasa. He got his second chance in 2002, when he was credited with pulling the country out of recession.
