I dont see textblock or textbox in APP (XAML) (Visual Studio) - visual-studio

Question

I tried to add a textbox and textblock to register page and in the preview its looks like that:
enter image description here
But when I run the project I see only the background without the textbox or the textblocks.
I tried to change to order or anything but without the background its just white blank page so the background does not hidding the text.
Thanks for helping.
The code:
<Page
x:Class="App2.RegisterPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App2"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid Name="g1">
<Grid.Background>
<ImageBrush ImageSource="/IMAGES/Reg.png" Stretch="Fill"/>
</Grid.Background>
<TextBlock Margin="719,291,404,588" FontSize="105" FontFamily="Gisha" FontWeight="ExtraBold" Text="הרשמה"/>
<TextBox FontSize="50" Name="age" Text="גיל" Height="100" Margin="802,419,330,481" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
<TextBox FontSize="50" Name="location" Text="מקום מגורים" Height="100" Margin="802,519,330,381"/>
<TextBox FontSize="50" Name="username" Text="שם משתמש" Height="100" Margin="802,619,330,281" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
</Grid>

Answer 1

I believe your TextBox's height and/or width is interfering with the xaml app's height and/or width
For Example..
My xaml app's borders(width, height) were 15 and 19, and the TextBox's borders(width, height) were 16, 20 -- That would interfere with app's borders, making the TextBox invisible, or, in simple terms, textBox1.Visible = false;
Just either downsize your TextBox, or up-size your xaml app.
Happy to help :)