Walleby/Wallet.Avalonia/WalletNavigationView.axaml

<NavigationViewItem
    x:Class="Wallet.Avalonia.WalletNavigationView"
    xmlns="https://github.com/avaloniaui"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ui="using:FluentAvalonia.UI.Controls"
    xmlns:vm="using:Wallet"
    x:Name="NavigationViewItem"
    x:DataType="vm:WalletNavigationViewModel"
    Content="{Binding Name}"
    IsExpanded="{Binding IsExpanded}"
    IsSelected="{Binding IsSelected}"
    MenuItemsSource="{Binding}"
    NavigationViewExtension.IsItemInvokedEnabled="True"
    SelectsOnInvoked="True">
    <Interaction.Behaviors>
        <DataTriggerBehavior Binding="{Binding IsOpened}" Value="False">
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsSelected}" RightOperand="True" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <NavigateAction Region="Main" Route="OpenWallet">
                    <Parameter Key="Name" Value="{Binding Name}" />
                </NavigateAction>
                <ChangePropertyAction
                    PropertyName="SelectsOnInvoked"
                    TargetObject="{Binding #NavigationViewItem}"
                    Value="True" />
            </ConditionAction>
        </DataTriggerBehavior>
        <DataTriggerBehavior Binding="{Binding IsOpened}" Value="True">
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsSelected}" RightOperand="True" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <ChangePropertyAction
                    PropertyName="SelectsOnInvoked"
                    TargetObject="{Binding #NavigationViewItem}"
                    Value="False" />
                <InvokeNavigationViewItemAction />
            </ConditionAction>
        </DataTriggerBehavior>
        <AttachedBehaviour>
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsOpened}" RightOperand="False" />
                        <ComparisonCondition LeftOperand="{Binding IsSelected}" RightOperand="True" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <NavigateAction Region="Main" Route="OpenWallet">
                    <Parameter Key="Name" Value="{Binding Name}" />
                </NavigateAction>
            </ConditionAction>
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsOpened}" RightOperand="True" />
                        <ComparisonCondition LeftOperand="{Binding IsActivated}" RightOperand="False" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <NavigateAction Region="Main" Route="Wallet" />
                <InvokeNavigationViewItemAction />
            </ConditionAction>
        </AttachedBehaviour>
        <AttachedEventTriggerBehaviour RoutedEvent="{x:Static NavigationViewExtension.ItemInvokedEvent}">
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsOpened}" RightOperand="False" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <NavigateAction Region="Main" Route="OpenWallet">
                    <Parameter Key="Name" Value="{Binding Name}" />
                </NavigateAction>
            </ConditionAction>
            <ConditionAction>
                <ConditionAction.Condition>
                    <ConditionalExpression ForwardChaining="And">
                        <ComparisonCondition LeftOperand="{Binding IsOpened}" RightOperand="True" />
                        <ComparisonCondition LeftOperand="{Binding IsActivated}" RightOperand="False" />
                    </ConditionalExpression>
                </ConditionAction.Condition>
                <InvokeNavigationViewItemAction />
            </ConditionAction>
        </AttachedEventTriggerBehaviour>
        <DataTriggerBehavior Binding="{Binding IsOpened}" Value="False">
            <RemoveClassAction ClassName="Closed" />
            <AddClassAction ClassName="Closed" RemoveIfExists="True" />
        </DataTriggerBehavior>
        <DataTriggerBehavior Binding="{Binding IsOpened}" Value="True">
            <RemoveClassAction ClassName="Opened" />
            <AddClassAction ClassName="Opened" RemoveIfExists="True" />
        </DataTriggerBehavior>
    </Interaction.Behaviors>
    <NavigationViewItem.Styles>
        <Style Selector="ui|NavigationViewItem.Closed">
            <Setter Property="IconSource">
                <Setter.Value>
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                </Setter.Value>
            </Setter>
        </Style>
        <Style Selector="ui|NavigationViewItem.Opened">
            <Setter Property="IconSource">
                <Setter.Value>
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</NavigationViewItem>