WPF

public partial class MainWindow : Window
    {
        public TempDataClass tDataClass;

        public MainWindow()
        {
            this.InitializeComponent();
            tDataClass = new TempDataClass();

        }
        private void SomeMainFunction()
        {
            if (SomeMainCondition1)
            {
                tDataClass.someClassFunction1();
                //WPF_Grid.Visibility is accessible here
                //But my requirement is not that
            }
            else
            {
                tDataClass.someClassFunction2();
                //WPF_Grid.Visibility is accessible here
                //But my requirement is not that
            }
        }
    }

public class TempDataClass : DependencyObject
{
    public FolderFilingDataClass()
    {
        //code
    }
    //
    public void someClassFunction1()
    {
        //code
        if (SomeClassCondition1)
        {
            WPF_Grid.Visibility = Visibility.Hidden;
            //But it is not accessible here
        }
        //code
    }
    //
    public void someClassFunction2()
    {
        //code
        if (SomeClassCondition2)
        {
            WPF_Grid.Visibility = Visibility.Visible;
            //But it is not accessible here
        }
        //code
    }
}

<Grid x:Name="PatientSearchResultsGrid"  Grid.Row="2" Margin="0" >
               <Grid.ColumnDefinitions>
                   <ColumnDefinition Width="*"/>
               </Grid.ColumnDefinitions>
               <Grid.RowDefinitions>
                   <RowDefinition Height="*"/>
               </Grid.RowDefinitions>
                   <StackPanel Grid.Row="1" Margin="0,12,0,46" >
                       <Grid Margin="0,3,4,23"   Panel.ZIndex="596" x:Name="LayoutGrid"  Visibility="{Binding HideShowDatagrid,  Converter={StaticResource MyBooleanToVisibilityConverter}}" >
                           <Grid.ColumnDefinitions>
                               <ColumnDefinition Width="*"/>
                               <ColumnDefinition Width="Auto"/>
                           </Grid.ColumnDefinitions>
                           <Grid.RowDefinitions>
                               <RowDefinition Height="Auto"/>
                           </Grid.RowDefinitions>

                                   <dg:DataGrid
                                   Cursor="Hand"
                                   Grid.Row="1"
                                   AlternationCount="2"
                                   SelectedItem="{Binding SelectedPerson}"
                                   ItemsSource="{Binding SelectedPeople}"
                                   Style="{DynamicResource DataGridStyle}"
                                   AutoGenerateColumns="False"
                                   x:Name="PatientSearchResultsDG"
                                   Margin="2,-17.8,3,1.7" BorderThickness="1,0,1,1" BorderBrush="#FF202020"     >

                                       <dg:DataGrid.Resources>
                                           <Style TargetType="{x:Type dg:DataGridRowHeader}">
                                               <Setter Property="Background" Value="Transparent"/>
                                           </Style>
                                       </dg:DataGrid.Resources>

                                       <dg:DataGrid.Columns>
                                           <dg:DataGridTextColumn Binding="{Binding Name}" IsReadOnly="True" x:Name="PatientName"  Width="*"     Header="Name"    />
                                           <dg:DataGridTextColumn Binding="{Binding SidNumber}"  IsReadOnly="True" x:Name="SID"  Width="*"  Header="SID" />
                                           <dg:DataGridTextColumn Binding="{Binding InmateNumber}"  IsReadOnly="True" x:Name="InmateNum"  Width="*"  Header="Inmate #"  />
                                           <dg:DataGridTextColumn Binding="{Binding Sex}" IsReadOnly="True"   x:Name="Sex"  Width="*"  Header="Sex"  />
                                           <dg:DataGridTextColumn Binding="{Binding DateOfBirth, StringFormat=' \{0:MM/dd/yyyy\}'}"   IsReadOnly="True"  x:Name="DOB"  Width="*"  Header="Date of Birth" />
                                           <dg:DataGridTextColumn Binding="{Binding FacilityName}" IsReadOnly="True"   x:Name="Facility"  Width="*"  Header="Facility"  />
                                           <dg:DataGridTextColumn Binding="{Binding Housing}"  IsReadOnly="True"  x:Name="Housing"  Width="*"  Header="Housing"  />
                                           <dg:DataGridTextColumn Binding="{Binding Active}"  IsReadOnly="True"  x:Name="Active"  Width="*"  Header="Active"  />
                                           <dg:DataGridTextColumn Binding="{Binding Locked}" IsReadOnly="True"  x:Name="Locked"   Width="*"  Header="Locked"  />
                                       </dg:DataGrid.Columns>
                                   </dg:DataGrid>

                       </Grid>
       </StackPanel>
     </Grid>