Readme.NuGet.md

z:Bind is a xaml markup extension for Xamarin.Forms that allows you to bind directly to an expression

If you want to do things like this: (note the expression is enclosed inside quotes)

<StackLayout 
	IsVisible="{z:Bind '(Item.Count != 0) AND (Status == \'Administrator\')'}" > ...

1. Install FunctionZero.zBind to your shared project
2. add xmlns:z="clr-namespace:FunctionZero.zBind.z;assembly=FunctionZero.zBind"
   To your xaml page (or let Visual Studio do it for you)
3. That's all you need to do :)

Head over here for source code, documentation and a sample application