DataGridViewRowCollection.Clear Method ()
Clears the collection.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The collection is data bound and the underlying data source does not support clearing the row data.
The associated DataGridView control is performing one of the following actions that temporarily prevents the row collection from being modified:
This method is being called from a handler for one of the following DataGridView events:
Available since 2.0