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Disable a context menu button in WPF

I created a button that looks like:
Here is the xaml:
<Button x:Name="InstallButtonContainer" Style="{StaticResource ResourceKey=StyleAppButton}" Grid.Column="3" >
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="15"/>
</Grid.ColumnDefinitions>
<Button x:Name="InstallButton" Content="Install" Grid.Column="0"
Style="{StaticResource ResourceKey= StyleDropDownButton}"
ToolTip="{x:Static local:ToolTipStrings.INSTALLBUTTONTOOLTIP}" Click="InstallButton_Click"
ToolTipService.ShowDuration="2000"
Margin="-20,-2,-4.5,-2" Grid.ColumnSpan="2" Width="51" FontFamily="Calibri" />
<Button x:Name="DropdownButton" Grid.Column="1" Margin="18,-2,-20,-2"
Width="14" Click="load_install_dropdown" Style="{StaticResource ResourceKey= StyleDropDownButton}">
<Button.ContextMenu>
<ContextMenu x:Name="ButtonContextMenu">
<MenuItem Header="Install" Click="BaseReleaseInstallContextMenuClick" x:Name="MultiInstallBtn">
<MenuItem.Icon>
<Image Width="12" Height="12">
<Image.Source>
<ImageSource>Resources/install.ico</ImageSource>
</Image.Source>
</Image>
</MenuItem.Icon>
</MenuItem>
<MenuItem Header="Silent Install" Click="BaseReleaseSilentInstallContextMenuClick" x:Name="MultiInstallSilentBtn">
<MenuItem.Icon>
<Image Width="12" Height="12">
<Image.Source>
<ImageSource>Resources/install.ico</ImageSource>
</Image.Source>
</Image>
</MenuItem.Icon>
</MenuItem>
<MenuItem Header="Download" Click="BaseReleaseMultipleDownloadContextMenuClick">
<MenuItem.Icon>
<Image Width="12" Height="12">
<Image.Source>
<ImageSource>Resources/Down.png</ImageSource>
</Image.Source>
</Image>
</MenuItem.Icon>
</MenuItem>
</ContextMenu>
</Button.ContextMenu>
<StackPanel Orientation="Horizontal">
<Path x:Name="BtnArrow" Margin="-3,-10" VerticalAlignment="Center" Width="8" Height="10" Fill="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"
Stretch="Uniform" HorizontalAlignment="Right"
Data="F1 M 301.14,-189.041L 311.57,-189.041L 306.355,-182.942L 301.14,-189.041 Z "/>
</StackPanel>
</Button>
</Grid>
</Button>
Now based on some condition, I want to disable the Install and Silent Install buttons through code.
I tried using:
if(condition)
{
MultiInstallBtn.IsEnabled = false;
}
but it does not seems to work. Is there anything wrong in the way I am accessing it?

As long as that code is in the code behind of the control then it should work.
I notice that there may be some custom styling being applied too. Could it be that you are missing styling for the menu item disabled state? So the menu item is actually disabled, but visually it doesn't present in a different way?
Check that in the style or control template for the Menu Item that it is reacting to the control's IsEnabled property or that there's a "Disabled" VisualState defined.

How to Immediately close/minimize/maximize regardless any open menu/combox inside the wpf window

I am trying to make a WPF window with some comboboxs and menus.
After any comboxbox or the menu is opened or clicked , when I try to close/minimize/maximize using the icons built-in with the WPF window itself , it takes me two clicks , the first one is to close the menu/combox and the second click is to close/minimize/maximize.
I want to overcome this behavior , which means to close/minimize/maximize the WPF window by one single click regardless any open menus or comboboxes.
Any help please?
<Window x:Class="ConnectionTable.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:ConnectionTable"
mc:Ignorable="d"
Closing="Window_Closing"
Title="GUI Console" WindowStartupLocation="CenterScreen" WindowState="Maximized">
<Grid HorizontalAlignment="Stretch" Height="auto" Margin="0,0,0,0" VerticalAlignment="Stretch" Width="auto">
<Button x:Name="b1" Content="Connect" HorizontalAlignment="Right" Margin="0,0,56.333,23.333" VerticalAlignment="Bottom" Width="140" Height="52" Click="Button_Click"/>
<Button x:Name="b2" Content="Filter" HorizontalAlignment="Right" Margin="0,0,240.333,23.333" VerticalAlignment="Bottom" Width="140" Height="52" Click="Filter_Click" IsEnabled="False" />
<Button x:Name="b3" Content="Mail" HorizontalAlignment="Right" Margin="0,0,400.333,23.333" VerticalAlignment="Bottom" Width="140" Height="52" Click="SendMail" IsEnabled="False"/>
<DataGrid x:Name="dg" IsReadOnly="True" Margin="50,47,56.333,114.333" Background="#FFC9DEF5" />
<ComboBox x:Name="cbox" HorizontalAlignment="Left" Margin="39,550,0,22.333" Width="150" Height="30" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto">
</ComboBox>
<ComboBox x:Name="cbox2" HorizontalAlignment="Left" Margin="200,550,0,22.333" Width="150" Height="30">
<ScrollViewer VerticalScrollBarVisibility="Auto" Height="70" CanContentScroll="True" Width="150" >
<StackPanel x:Name="spanel2" CanVerticallyScroll="True"/>
</ScrollViewer>
</ComboBox>
<Menu HorizontalAlignment="Stretch" VerticalAlignment="Top">
<MenuItem Header="_File">
<MenuItem Command="Save" HorizontalAlignment="Left" Width="150"/>
<Separator HorizontalAlignment="Left" Width="150"/>
<MenuItem Command="Close" HorizontalAlignment="Left" Width="150"/>
</MenuItem>
<MenuItem Header="_Edit">
<MenuItem Command="Cut" />
<Separator HorizontalAlignment="Left" Width="140"/>
<MenuItem Command="Copy" />
<Separator HorizontalAlignment="Left" Width="140"/>
<MenuItem Command="Paste" />
</MenuItem>
</Menu>
</Grid>

C# WPF - button picture looks differently on Windows 7 and Windows 10

I am trying to build application which has some pictures drawn on buttons. Application looks nice on Windows 7 - as expected, although on Windows 10 it looks differently.
Despite Defined width and height size, image is truncated.
Uploaded screens:
1: Windows 7 vs. Windows 10
2: Windows 7 vs. Windows 10
]2
<Menu x:Name="menu" HorizontalAlignment="Stretch" Height="25" Margin="0,0,0,0" VerticalAlignment="Center" Width="Auto" DockPanel.Dock="Top">
<MenuItem Header="_Soubor" Height="25" HorizontalAlignment="Center" VerticalAlignment="Center">
<MenuItem Click="NewCalculation_Click">
<MenuItem.Header>
<TextBlock Text="_Nová kalkulace" VerticalAlignment="Center"/>
</MenuItem.Header>
<MenuItem.Icon>
<Image Source="graphics/icons/new.ico" Height="35" Width="35" />
</MenuItem.Icon>
</MenuItem>
<Separator/>
<MenuItem Click="saveCalculation_Click">
<MenuItem.Header>
<TextBlock Text="Uložit kalkulaci" VerticalAlignment="Center"></TextBlock>
</MenuItem.Header>
<MenuItem.Icon>
<Image Source="graphics/icons/save.ico" Height="35" Width="35" />
</MenuItem.Icon>
</MenuItem>
<MenuItem Click="LoadCalculation_Click">
<MenuItem.Header>
<TextBlock Text="Načíst kalkulaci" VerticalAlignment="Center"></TextBlock>
</MenuItem.Header>
<MenuItem.Icon>
<Image Source="graphics/icons/load.ico" Height="35" Width="35" />
</MenuItem.Icon>
</MenuItem>
<Separator/>
<MenuItem Click="createReport_Click">
<MenuItem.Header >
<TextBlock Text="Vytvoř report" VerticalAlignment="Center"></TextBlock>
</MenuItem.Header>
<MenuItem.Icon>
<Image Source="graphics/icons/report.ico" Height="35" Width="35" />
</MenuItem.Icon>
</MenuItem>
<Separator/>
<MenuItem Click="endApp_Click">
<MenuItem.Header>
<TextBlock Text="Konec" VerticalAlignment="Center"></TextBlock>
</MenuItem.Header>
<MenuItem.Icon>
<Image Source="graphics/icons/close.ico" Height="35" Width="35" />
</MenuItem.Icon>
</MenuItem>
</MenuItem>
<MenuItem Header="_Nastavení" Height="25" HorizontalAlignment="Center" VerticalAlignment="Center">
<MenuItem x:Name="MenuSqlSetting" Header="_Připojení na SQL server" Click="MenuSqlSetting_Click"/>
</MenuItem>
<MenuItem Header="_O aplikaci" Click="MenuItem_Click" />
</Menu>
Code for second screen:
<Button x:Name="buttonRemove" Grid.Column="1" Margin="2,0,0,0" IsEnabled="False" Click="buttonRemove_Click" Background="White">
<StackPanel>
<Image Source="Graphics/remove.png" Width="50" Height="50"/>
</StackPanel>
</Button>
Thanks for any advice.

You should check this article before trying anything. It's all about the theme difference between win 7 and win 10.
https://arbel.net/2006/11/03/forcing-wpf-to-use-a-specific-windows-theme/

There is another workaround from Visual Studio.
You click with the mouse on the MenuItem and you look at the Template in the Property Inspector under the Miscellaneous group.
Then you "Convert to New Resource..."
see the image
so you will get the corresponding xaml transformed as
<MenuItem Command="{Binding YourCmd}" Header="Your Header"
Template="{DynamicResource MenuItemControlTemplate1}" >
Then you can build on your Windows 7 machine and deploy to Windows 10 without such issue.

Can't see or scroll to items in ScrollViewer

Ok so I have a grid that holds the menubar then in that grid I have a scrollviewer that holds another grid. If I put lets say a label on the most inner grid (one with scrollviewer) out of view all down vertically the scrollviewer cannot scroll so I can see it for some reason.
I set max heights for the scrollviewer and grid... and also added a button that we cannot scroll to.
<Grid Background="#FF1C1C1C" Margin="0,0,0,-1" Width="1160" ScrollViewer.CanContentScroll="True" MinWidth="1160">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="55*"/>
</Grid.ColumnDefinitions>
<Menu HorizontalAlignment="Left" Height="19" VerticalAlignment="Top" Width="1150">
<Menu.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="#FF343333" Offset="1"/>
</LinearGradientBrush>
</Menu.Background>
<MenuItem Header="FILE" Foreground="White">
<MenuItem Header="Open Accounts.txt" HorizontalAlignment="Left" Background="#FF1C1C1C"/>
<MenuItem Header="Exit" HorizontalAlignment="Left" Width="187" Background="#FF1C1C1C"/>
</MenuItem>
<MenuItem Header="SERVER" Foreground="White">
<MenuItem Header="Start" HorizontalAlignment="Left" Width="145" Background="#FF1C1C1C"/>
<MenuItem Header="Close" HorizontalAlignment="Left" Width="145" Background="#FF1C1C1C"/>
</MenuItem>
<MenuItem Header="VIEW" Foreground="White" Background="#FF1C1C1C">
<MenuItem Header="Client Manager" HorizontalAlignment="Left" Background="#FF1C1C1C"/>
<MenuItem Header="Search Utility" HorizontalAlignment="Left" Width="171" Background="#FF1C1C1C"/>
<MenuItem x:Name="DebugLogButton" Header="Debug Logger" HorizontalAlignment="Left" Width="171" Background="#FF1C1C1C" Click="onDebugLogClick"/>
</MenuItem>
</Menu>
<ScrollViewer Opacity="0.1" VerticalContentAlignment="Stretch" Margin="0,0,10,0" MinWidth="1150" MaxWidth="1150" Width="1150" MinHeight="600" MaxHeight="1500">
<Grid Width="1118" MinWidth="1118" MaxWidth="1118" MaxHeight="1500">
<Button Content="Button" HorizontalAlignment="Left" Margin="542,2479,0,-1890" VerticalAlignment="Top" Width="75"/>
</Grid>
</ScrollViewer>
</Grid>

I have resolved it.
The issue is improper use of Grid I now know that I need to make a row definition for the scroll viewer.

WindowsFormHost Paint Event Not Firing

I have a panel withing a WindowsFormHost in a WPF app. Eventually i need to be able to click and draw points. I had it working fully in a separate WinForm form... but for some reason the paint event won't fire at all when Invalidate() is called! The click event is definitely firing as the message box comes up on the click. Not a peep out of the paint even though. Can't figure out why for the life of me... here's the code.
XML:
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:wf="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
Title="MainWindow" Height="1000" Width="1000"
WindowState="Maximized" SizeChanged="Window_SizeChanged" LocationChanged="Window_LocationChanged" Background="Gray">
<DockPanel LastChildFill="True">
<ToolBarTray DockPanel.Dock="Top">
<ToolBar Width="Auto" HorizontalAlignment="Stretch">
<Menu>
<MenuItem Header="File" VerticalAlignment="Center">
<MenuItem Header="New" Click="MenuItem_Click_3" />
<MenuItem Header="Open" Click="MenuItem_Click_4"/>
<MenuItem Header="Open Recent">
<MenuItem Header="Some Recent Files"/>
</MenuItem>
<MenuItem Header="Import H2OFate File" Click="MenuItem_Click_7"/>
<Separator/>
<MenuItem Header="Save" Click="MenuItem_Click_1" />
<MenuItem Header="Save As" Click="MenuItem_Click_5"/>
<MenuItem Header="Save without Results"/>
<MenuItem Header="Delete Unnecessary Files"/>
<Separator/>
<MenuItem Header="File Options"/>
<Separator/>
<MenuItem Header="Project Info"/>
<MenuItem Header="Supply Info" />
<Separator/>
<MenuItem Header="Print" Click="MenuItem_Click_6" />
<Separator/>
<MenuItem Header="Reload Current File"/>
<MenuItem Header="Exit CTRL+Q" Click="MenuItem_Click"/>
</MenuItem>
<MenuItem Header="Network Design" VerticalAlignment="Center">
<MenuItem Header="Something" Click="MenuItem_Click_8"/>
</MenuItem>
<MenuItem Header="Run Analysis" VerticalAlignment="Center">
<MenuItem Header="Run" Click="MenuItem_Click_2"/>
</MenuItem>
<MenuItem Header="View Results" VerticalAlignment="Center">
<MenuItem Header="Numeric"/>
<MenuItem Header="X-Y Plots"/>
<MenuItem Header="Contours"/>
<MenuItem Header="Reports"/>
</MenuItem>
<MenuItem Header="Facilities Management" VerticalAlignment="Center">
<MenuItem Header="Some Item"/>
<MenuItem Header="Hydraulics"/>
<MenuItem Header="Contamination"/>
<MenuItem Header="Sensor Placement"/>
</MenuItem>
<MenuItem Header="Tools/Databases" VerticalAlignment="Center">
<MenuItem Header="Some Item"/>
<MenuItem Header="Hydraulics"/>
<MenuItem Header="Contamination"/>
<MenuItem Header="Sensor Placement"/>
</MenuItem>
<MenuItem Header="Help" VerticalAlignment="Center">
<MenuItem Header="Some Item"/>
<MenuItem Header="Help"/>
<MenuItem Header="Units"/>
<MenuItem Header="Demo Examples"/>
<MenuItem Header="Tutorial"/>
<MenuItem Header="How To"/>
<MenuItem Header="About"/>
</MenuItem>
</Menu>
</ToolBar>
<ToolBar>
<Button Height="38" Width ="50" VerticalAlignment="Center" Click="Button_Click_1">
<Ellipse Width="25" Height="25" Fill="Blue" Stroke="Black" VerticalAlignment="Center"/>
</Button >
<Button Height="38" Width ="50" VerticalAlignment="Center" Click="Button_Click_1">
<Rectangle Width="38" Fill="Red" Height="7" Stroke="Black"/>
</Button >
<Button Height="38" Width ="50" VerticalAlignment="Center" Click="Button_Click_2">
<Polygon Fill="Yellow" Stroke="Black" Points="0,10 30,10 30,0 28,0 28,3 2,3 2,0 0,0" VerticalAlignment="Center"/>
</Button >
<Button Height="38" Width ="50" VerticalAlignment="Center" Click="Button_Click_3">
<Polygon Stroke="Black" Fill="Green" VerticalAlignment="Center" Points="22,0 22,7 15,7 15,15 9,15 9,7 0,7 0,0 "/>
</Button >
</ToolBar>
</ToolBarTray>
<TabControl Width ="1000" DockPanel.Dock="Left">
<TabItem Header="Map">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<WindowsFormsHost Grid.Row="0" x:Name="wfPanel" >
<WindowsFormsHost.Child>
<wf:Panel x:Name="wfSurface" MouseClick="wfSurface_MouseClick"/>
</WindowsFormsHost.Child>
</WindowsFormsHost>
</Grid>
</TabItem>
<TabItem Header="Map Settings">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="250"/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Button Content="Testing 123"/>
</Grid>
</TabItem>
</TabControl>
<TabControl DockPanel.Dock="Right">
</TabControl>
</DockPanel>
C#
private void wfSurface_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics g;
g = wfSurface.CreateGraphics();
epanet epa = epanet.GetInstance();
SolidBrush s = new SolidBrush(System.Drawing.Color.Blue);
g.FillEllipse(s, Convert.ToInt32(epa.xCord), Convert.ToInt32(epa.yCord), 50, 50);
g.FillEllipse(s, 400, 400, 500, 500);
MessageBox.Show("paint event fired");
}
private void wfSurface_MouseClick(object sender, System.Windows.Forms.MouseEventArgs e)
{
epanet epa = epanet.GetInstance();
epa.xCord = e.X;
epa.yCord = e.Y;
MessageBox.Show("xCord is: " + e.X.ToString());
wfSurface.Invalidate();
}
Edit:
And to further check that the paint event is the issue I added the line g.FillEllipse(s,400,400,400,400); into the click event and it successfully drew the ellipse.

Not much of a WPF guy, but my guess would be to add this:
<WindowsFormsHost.Child>
<wf:Panel x:Name="wfSurface" Paint="wfSurface_Paint"
MouseClick="wfSurface_MouseClick"/>
</WindowsFormsHost.Child>