Moving a part of xaml file to another xaml file - wpf

Question

In my project, I have XAML file like this:
<Grid Margin="50,0,0,0">
//Huge amount of code goes here
</Grid>
It is very difficult to go through all the code in Grid while designing. Can I move all the code to a separate XAML file file and in in this Grid content i will call that XAML file??
<Grid Margin="50,0,0,0">
//call xaml file here
</Grid>

Answer 1

You should define a UserControl; assume the "Huge amount of code" is sth like this:
<Border Name="yourBorder">
//Other Xamls
</Border>
Now you create a new UserControl an put this Border in it
<UserControl x:Class="WpfApplication.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Border Name="yourBorder">
//Other Xamls
</Border>
</UserControl>
You can use UserControl1 in other Xamls. You should add xmlns:wp="clr-namespace:WpfApplication" to your Xaml. For example if you want to use it in a Window:
<Window x:Class="WpfApplication.Window2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:wp="clr-namespace:WpfApplicationUpper" //This is what I mentioned
Title="Window2" Height="300" Width="300">
<StackPanel>
<wp:UserControl1 /> // You call it using this format
</SatckPanel>