How to use this part of code !

I wanna to use this code in my xamarin (C#) android ?

public class FractionalSizeView extends View { public FractionalSizeView(Context context, AttributeSet attrs) { super(context, attrs); }

public FractionalSizeView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); }

@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int width = MeasureSpec.getSize(widthMeasureSpec); setMeasuredDimension(width * 70 / 100, 0); } }