YOUserbase/CreateUserPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="YOUserbase.CreateUserPage"
    x:DataType="ContentPage"
    x:Name="contentPage"
    Title="Create a new user">
    <ContentPage.Resources>
        <Style
            x:Key="InvalidEntryStyle"
            TargetType="Entry">
            <Setter
                Property="BackgroundColor"
                Value="Red" />
        </Style>
        <Style
            x:Key="ValidEntryStyle"
            TargetType="Entry">
            <!--<Setter Property="TextColor" Value="Green" />-->
        </Style>
    </ContentPage.Resources>

    <ScrollView>
        <VerticalStackLayout
            Spacing="25"
            Padding="300,60">
            <Label
                x:Name="lblFirstname"
                Text="First name:" />
            <Entry
                x:Name="FirstnameEntry"
                HorizontalOptions="FillAndExpand" />
            <Label
                x:Name="errFirstname"
                TextColor="Red" />

            <Label
                x:Name="lblLastname"
                Text="Family name:" />
            <Entry
                x:Name="LastnameEntry"
                HorizontalOptions="FillAndExpand" />
            <Label
                x:Name="errLastname"
                TextColor="Red" />

            <Label
                x:Name="lblBirthDate"
                Text="Birth date:" />
            <DatePicker
                x:Name="birthdatePicker"
                MaximumDate="1/1/2023" />
            <Label
                x:Name="errBirthDate"
                TextColor="Red" />

            <Picker
                x:Name="groupPicker"
                Title="Select working group" />
            <Label
                x:Name="errGroup"
                TextColor="Red" />

            <HorizontalStackLayout
                Spacing="10">
                <Switch
                    x:Name="FullTimeSwitch"
                    IsToggled="True"
                    VerticalOptions="Center" />
                <Label
                    x:Name="lblSwitch"
                    Text="Full employment"
                    VerticalOptions="Center">
                    <Label.Triggers>
                        <DataTrigger
                            TargetType="Label"
                            Binding="{Binding Source={x:Reference FullTimeSwitch}, Path=IsToggled}"
                            Value="true">
                            <Setter
                                Property="Text"
                                Value="Partial employment" />
                        </DataTrigger>
                    </Label.Triggers>
                </Label>
            </HorizontalStackLayout>

            <Label
                x:Name="lblDetails"
                Text="Additional details:" />
            <Entry
                x:Name="DetailsEntry"
                Text="" />
            <Label
                x:Name="errDetails"
                TextColor="Red" />

            <Label
                x:Name="lblCheckbox"
                Text="Check the correct information for this user" />
            <HorizontalStackLayout
                Spacing="10">
                <CheckBox
                    x:Name="IsExternalCheck"
                    IsChecked="False"
                    VerticalOptions="Center" />
                <Label
                    x:Name="lblExternal"
                    Text="Works external"
                    VerticalOptions="Center" />
            </HorizontalStackLayout>
            <HorizontalStackLayout
                Spacing="10">
                <CheckBox
                    x:Name="IsRemoteCheck"
                    IsChecked="False"
                    VerticalOptions="Center" />
                <Label
                    x:Name="lblRemote"
                    Text="Works remotely"
                    VerticalOptions="Center" />
            </HorizontalStackLayout>

            <Label
                x:Name="lblNbProjects"
                Text="This user is currently working in how many projects" />
            <HorizontalStackLayout
                Spacing="10">
                <Stepper
                    x:Name="NbProjectsStepper"
                    Maximum="10"
                    Minimum="0"
                    Increment="1"
                    Value="1"
                    ValueChanged="OnStepperChanged"
                    VerticalOptions="Center" />
                <Label
                    x:Name="lblNbProj"
                    Text="1"
                    VerticalOptions="Center" />
            </HorizontalStackLayout>

            <Button
                x:Name="btnCreate"
                Text="Create"
                Clicked="OnCreateClicked" />
        </VerticalStackLayout>
    </ScrollView>

</ContentPage>