C# and arduino connection - controling a WPF application

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C#

Arduino

I'm still new to the world of programming but I need some help with this if it's possible. If not, that's okay too.
I have this task where I have to establish a connection between C# (WPF) and Arduino. Now, I managed to connect the LCD so it outputs the values from the potenciometer to the LCD screen like in this Picture Once I have the connection between Arduino and C#, C# must output those values from the potenciometer to the "Line" form. So, in shorter words, How I change the current value with the potenciometer, the line in C# MUST be moving as I do it. I'm very bad at explaining so hopefully You understood what I was saying :P If anyone could help me with this task, I'd be more than happy. Thanks in advance

Programs: Microsoft Visual Studio (2008-2015), Arduino (latest version)
Language: C#
Application: WPF (.NET Framework 4.5)
OS: Windows

Line Form code:

    <Line
    Name="TheLine"
    Stretch="Fill"
      X1="1" X2="1" Y1="0" Y2="1"
      Width="2"
      HorizontalAlignment="Center"
      Stroke="Black"
      >
    <Line.RenderTransform>
        <TransformGroup>
            <RotateTransform CenterX="1" CenterY="{Binding ActualHeight, ElementName=TheLine}"

                              Angle="{Binding Path=Value, ElementName=AngleSlider}" />
        </TransformGroup>
    </Line.RenderTransform>
</Line>
<StackPanel Grid.Column="1">
    <Slider Name="AngleSlider" Minimum="-90" Maximum="90" Value="0" Height="59" Width="200" />
</StackPanel>

Arduino code:

#include <LiquidCrystal.h>

 // initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int sensorPin = A0;    // select the input pin for the potentiometer
int sensorValue = 0; // variable to store the value coming from the sensor

 
 void setup() {
  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Welcome!");
  delay(3000);
  lcd.clear();
  Serial.begin(9600);  
}

 void loop() {
  lcd.print("Current value:");
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);     
  lcd.setCursor(0, 1);
  lcd.print(sensorValue /4);
  lcd.print("/255 ");
  delay(10);
  lcd.clear();
  Serial.println(sensorValue);
  delay(10);
  
}

What I have tried:

I managed to establish a connection between c# and arduino but to read the values from the potenciometer and bring them onto the line is what I struggle.