// import

import System.Windows.Forms;

// get clipboard data and if any then show in MessageBox

// Retrieves the data from the clipboard.

IDataObject iData = Clipboard.GetDataObject();

// Determines whether the data is in text format.

if(iData.GetDataPresent(DataFormats.Text))

{   

        // do anything

        MessageBox.Show((String)iData.GetData(DataFormats.Text));

}

// See the DataFormats class for other types