Please help to do OLAP connectivity

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C#

OLAP

Unable do OLAP connectivity

  using (OleDbConnection connection = new OleDbConnection("Provider=MSOLAP.3;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Adventure Works DW 2008R2;Data Source=http://demos.telerik.com/olap/msmdpump.dll"))
            {

                connection.Open();
}

What I have tried:

MSOLAP.3
MSOLAP
MSOLAP.5
MSOLAP.4

tried plus

Data Source=https://demos.telerik.com/olap/msmdpump.dll; Initial Catalog=Adventure Works DW 2008R2;Cube Name=Adventure Works;

tried