Error while importing data from excel to table

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C#

Hi,
When I am trying to import data from excel to table it's giving me following error :-
An exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll but was not handled in user code

Additional information: External table is not in the expected format.

I am using following code:-

OleDbConnection excelConn = new OleDbConnection();
excelConn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + filelocation + "';Extended Properties=Excel 8.0");
 excelConn.Open();