angular/material

I am integrate angular/material2 when I am make example of select so I got error
Can't bind to 'ng-value' since it isn't a known property of 'md-option'.

1. If 'md-option' is an Angular component and it has 'ng-value' input, then verify that it is part of this module.
2. If 'md-option' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message.
   (""Food i would like to eat" [formControl]="foodControl">
   Please help me