To use the Find method, the DataTable object to which the DataRowCollection object belongs must have at least one column designated as a primary key column. See the PrimaryKey property for more information about how to create a primary key column.
The following example uses the Find method to find the primary key value "2" in a collection of DataRow objects. The method returns the specific DataRow object letting you change its values, as needed.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)