How to read a text file of json in C#, WPF, SQL

//i have create a table of json content 
 String CREATE_EMPLOYEE_TABLE = "CREATE TABLE IF NOT  " + "EXISTS TABLE_EMPLOYEE(EMPLOYEE_ID INTEGER PRIMARY KEY,"
                   + " EMPLOYEE_SITEID  INTEGER, "
                   + " EMPLOYEE_GROUPID  INTEGER, "
                   + " EMPLOYEE_ID  INTEGER) ";
				     SqliteCommand TABLE_EMPLOYEE = new SqliteCommand(CREATE_EMPLOYEE_TABLE, db);

//and i created a class also
  public class EmployeeItem
    {

        public int Id { get; set; }
        public Int64 SiteID { get; set; }
        public Int64 GroupID { get; set; }
    }

using iTextSharp.text.pdf.parser;   // i can't install this package also

namespace DBCon
{
    public class EmployeeItem
    {

        public static void Main(string[] args)
        {

            try
            {
                string st = File.ReadAllText("file path of the text file") ;
                Console.WriteLine(st);
            }
            catch (Exception e)
            {
                Console.WriteLine("The file could not be read:");

                Console.WriteLine(e.Message);
            }
            Console.Read();

        }

<Grid>
        <Button x:Name="abc" Content="NAVIGATE" HorizontalAlignment="Center" Height="100" Click="abc_Click"></Button>
    </Grid>

private void abc_Click(object sender, RoutedEventArgs e)
       {
           this.Frame.Navigate(typeof(BlankPage1));
       }

public sealed partial class BlankPage1 : Page
  {
      public BlankPage1()
      {
          this.InitializeComponent();
          LoadSites();
      }
      void LoadSites()
      {
          List<String> BlankPage1 = DataAccess.Getemployee();
      }
  }

public class DataAccess
  {
      public async static void InitializeDatabase()
      {
          await ApplicationData.Current.LocalFolder.CreateFileAsync("chillDatabase.db", CreationCollisionOption.OpenIfExists);
          string dbpath = Path.Combine(ApplicationData.Current.LocalFolder.Path, "chillDatabase.db");
          using (SqliteConnection db =
              new SqliteConnection($"Filename={dbpath}"))
          {
              db.Open();

              // ========================{ TABLE_EMPLOYEE }===================================
              String CREATE_EMPLOYEE_TABLE = "CREATE TABLE IF NOT  " + "EXISTS TABLE_EMPLOYEE(EMPLOYEE_ID INTEGER PRIMARY KEY,"
      + " EMPLOYEE_SITEID  INTEGER, "
      + " EMPLOYEE_GROUPID  INTEGER, "
      + " EMPLOYEE_ID  INTEGER, )";
              SqliteCommand TABLE_EMPLOYEE = new SqliteCommand(CREATE_EMPLOYEE_TABLE, db);

              TABLE_EMPLOYEE.ExecuteReader();

          }
      }


      public static void AddEmployee(EmployeeItem Employee)
      {
          string dbpath = Path.Combine(ApplicationData.Current.LocalFolder.Path, "chillDatabase.db");
          using (SqliteConnection db =
            new SqliteConnection($"Filename={dbpath}"))
          {
              db.Open();

              SqliteCommand insertCommand = new SqliteCommand();
              insertCommand.Connection = db;

              insertCommand.CommandText = "INSERT or REPLACE INTO SiteInfoTable VALUES (@EMP_SITEID, @EMP_GroupID, @EMP_ID,)";

              insertCommand.Parameters.AddWithValue("@EMP_SITEID ", Employee.SiteID);
              insertCommand.Parameters.AddWithValue("@EMP_GroupID ", Employee.GroupID);
              insertCommand.Parameters.AddWithValue("@EMP_ID ", Employee.Id);



              try
              {
                  insertCommand.ExecuteNonQuery();
              }
              catch (Exception ex)
              {
                  throw new Exception(ex.Message);
              }
          }

      }
      public static List<String> Getemployee()
      {




              try
              {
                   string rawJson = File.ReadAllText(@"E:\\database\\GetAllEmp.txt");

              List<EmployeeItem> employees = JsonConvert.DeserializeObject<List<EmployeeItem>>(rawJson);
          }
              catch (Exception e)
              {
                  Console.WriteLine("The file could not be read:");

                  Console.WriteLine(e.Message);
              }
              Console.Read();


          return null;

      }

  }

ListView x:Name="itemList" Width="auto" Grid.Row="4" ItemsSource="{Binding Mode=TwoWay}" 
          Margin="60,0,60,0" BorderThickness="1" 
  BorderBrush="{ThemeResource SystemControlForegroundBaseMediumLowBrush}" Height="380" >
            <ListView.ItemTemplate>
                <DataTemplate x:DataType="local:EmployeeItem">

                    <TextBlock Width="auto" Text="{Binding SiteID}"  FontSize="16"
                                   Foreground="Black"/>

                </DataTemplate>
            </ListView.ItemTemplate>

        </ListView>