luismts

var grid = new Grid();

var label = new Label { Text = "Code:" };
grid.Children.Add(label, 0, 1);

var entry = new Entry 
{ 
   Placeholder = "Enter number", 
   Keyboard = Keyboard.Numeric, 
   BackgroundColor = Color.AliceBlue, 

luismts

• Reducing executable size: http://developer.xamarin.com/guides/cross-platform/deployment,_testing,_and_metrics/memory_perf_best_practices/#Reducing_Executable_Size

• Use the linker (iOS [1], Android [2]) to remove unnecessary code from your assemblies [1] https://developer.xamarin.com/guides/ios/advanced_topics/linker [2] https://developer.xamarin.com/guides/android/advanced_topics/linking

• Reference third-party libraries judiciously

• Applying constraints to generics may reduce app size, since less code would need to be included (haven’t verified this)

luismts

...
new Entry { Placeholder = "Sigueme en las redes @luismatosluna", Keyboard = Keyboard.Numeric }            
            .Grid.Row(2) .Grid.ColumnSpan(2) .Margin(myMargin) .Height(20) 
            .Bind(nameof(vm.RegistrationCode), BindingMode.TwoWay),
...

luismts

...
new Entry { Placeholder = "Sigueme en las redes @luismatosluna", Keyboard = Keyboard.Numeric,
            Margin = myMargin, HeightRequest = 20 }
            .Grid.Row(2) .Grid.ColumnSpan(2)
            .Bind(nameof(vm.RegistrationCode), BindingMode.TwoWay),
...

luismts

...
<Entry Placeholder="Sigueme en las redes @luismatosluna" Keyboard="Numeric"
       Margin="{StaticResource myMargin}" HeightRequest="20"
       Grid.Row="2" Grid.ColumnSpan="2"
       Text="{Binding RegistrationCode, Mode=TwoWay}" />
...

luismts

...
Forms.SetFlags("Visual_Experimental");
...

luismts

Git Commit Best Practices

Basic Rules

Commit Related Changes

A commit should be a wrapper for related changes. For example, fixing two different bugs should produce two separate commits. Small commits make it easier for other developers to understand the changes and roll them back if something went wrong. With tools like the staging area and the ability to stage only parts of a file, Git makes it easy to create very granular commits.

Commit Often

Committing often keeps your commits small and, again, helps you commit only related changes. Moreover, it allows you to share your code more frequently with others. That way it‘s easier for everyone to integrate changes regularly and avoid having merge conflicts. Having large commits and sharing them infrequently, in contrast, makes it hard to solve conflicts.

luismts

/// XF Project
namespace UsingDependencyService
{
    public interface IToDo {
        void ToDo (); //note that interface members are public by default
    }
}

namespace UsingDependencyService.Service
{

luismts

public class RestService : IRestService
{
  HttpClient client;
  ...

  public RestService ()
  {
    client = new HttpClient (); // Creating the HTTPClient Object
  }
  

luismts

<CollectionView ItemsSource="{Binding Blogs}">
    <CollectionView.ItemTemplate>
        <DataTemplate>
            <Grid Padding="10">
              
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>