I has add telerik packages to my project
In XAML;
<?xml version="1.0" encoding="utf-8"?>
<ContentPage
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"
xmlns:local="clr-namespace:TExtA" x:Class="TExtA.TExtAPage">
<ContentPage.Content>
<StackLayout BackgroundColor="Aqua">
<telerikInput:RadAutoComplete HeightRequest="40" SuggestMode="Suggest" IsVisible="true" IsEnabled="true" SuggestionViewHeight="100" ShowSuggestionView="true" BackgroundColor="Black" x:Name="autoComplete" Watermark="Search here..." />
</StackLayout>
</ContentPage.Content>
</ContentPage>
In CS:
this.autoComplete.ItemsSource = new List<string>()
{
"Freda Curtis",
"Jeffery Francis",
"Eva Lawson",
"Emmett Santos",
"Theresa Bryan",
"Jenny Fuller",
"Terrell Norris",
"Eric Wheeler",
"Julius Clayton",
"Alfredo Thornton",
"Roberto Romero",
"Orlando Mathis",
"Eduardo Thomas",
"Harry Douglas",
"Parker Blanton",
"Leanne Motton",
"Shanti Osborn",
"Merry Lasker",
"Jess Doyon",
"Kizzie Arjona",
"Augusta Hentz",
"Tasha Trial",
"Fredda Boger",
"Megan Mowery",
"Hong Telesco",
"Inez Landi",
"Taina Cordray",
"Shantel Jarrell",
"Soo Heidt",
"Rayford Mahon",
"Jenny Omarah",
"Denita Dalke",
"Nida Carty",
"Sharolyn Lambson",
"Niki Samaniego",
"Rudy Jankowski",
"Matha Whobrey",
"Jessi Knouse",
"Vena Rieser",
"Roosevelt Boyce",
"Kristan Swiney",
"Lauretta Pozo",
"Jarvis Victorine",
"Dane Gabor"
};
Build and run no error, but on simulator not show anything, can touch, focus, type entrytext, not show watermark
XAmarin Forms 2.3.4.247
Telerik UI .2017.1.10118.233