Issue while establishing connection with excel

The below connection string establishes connection with excel file which has extension as '.xls' but same string throws an exception while opening a connection with file which has extension as .xlsx.

Any idea?

ConnectionString = Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\Users\abcd\Desktop\d开发者_C百科emo.xls; Extended Properties=excel 8.0; Persist Security Info=False

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This is because you need a different connection string for xlsx'es.