The zero-based index of the item with the specified property name and value.
The BindingSource.Find(string, object) method can only be used when the underlying list is an System.ComponentModel.IBindingList with searching implemented. This method simply refers the request to the underlying list's System.ComponentModel.IBindingList.Find(System.ComponentModel.PropertyDescriptor, object) method. For example, if the underlying data source is a System.Data.DataSet, System.Data.DataTable, or System.Data.DataView, this method converts propertyName to a System.ComponentModel.PropertyDescriptor and calls the System.Data.DataView.System#ComponentModel#IBindingList#Find(System.ComponentModel.PropertyDescriptor, object) method. The behavior of BindingSource.Find(System.ComponentModel.PropertyDescriptor, object), such as the value returned if no matching item is found, depends on the implementation of the method in the underlying list.
The property name comparison is case-insensitive.