public void PositionOnMainWindowScreen(Window window)
        {
            var mainwindowSource = PresentationSource.FromVisual(this) as HwndSource;
            var mainWindowScreen = Screen.FromHandle(mainwindowSource.Handle);
            window.WindowStartupLocation = WindowStartupLocation.Manual;
            window.Left = mainWindowScreen.WorkingArea.Left;
            window.Top = mainWindowScreen.WorkingArea.Top;
        }

public void PositionOnMainWindowScreen(Window window)
        {
            var mainwindowSource = PresentationSource.FromVisual(this) as HwndSource;
            var mainWindowScreen = Screen.FromHandle(mainwindowSource.Handle);
            window.WindowStartupLocation = WindowStartupLocation.Manual;
            window.Left = mainWindowScreen.WorkingArea.Left;
            window.Top = mainWindowScreen.WorkingArea.Top;
        }

string jwtMessage = "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0";
string publicKey = @"-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu1SU1LfVLPHCozMxH2Mo
4lgOEePzNm0tRgeLezV6ffAt0gunVTLw7onLRnrq0/IzW7yWR7QkrmBL7jTKEn5u
+qKhbwKfBstIs+bMY2Zkp18gnTxKLxoS2tFczGkPLPgizskuemMghRniWaoLcyeh
kd3qqGElvW/VDL5AaWTg0nLVkjRo9z+40RQzuVaE8AkAFmxZzow3x+VJYKdjykkJ
0iT9wCS0DRTXu269V264Vf/3jvredZiKRkgwlL9xNAwxXFg0x/XFw005UWVRIkdg
cKWTjpBP2dPwVZ4WWC+9aGVd+Gyn1o0CLelf4rEjGoXbAAEgAqeGUxrcIlbjXfbc
mwIDAQAB
-----END PUBLIC KEY-----";
string privateKey = @"PLACEHOLDER, private key same pem format"; 
string jwtSignature;
using (var rsa = RSA.Create())
{
    rsa.ImportFromPem(privateKey);
    jwtSignature = Base64UrlEncoder.Encode(rsa.SignData(Encoding.UTF8.GetBytes(jwtMessage), HashAlgorithmName.SHA256, RSASignaturePadding.Pss));
}
using (var rsa = RSA.Create())
{    
    rsa.ImportFromPem(publicKey);
    var signatureBytes = Encoding.UTF8.GetBytes(Base64UrlEncoder.Decode(jwtSignature));
    var data = Encoding.UTF8.GetBytes(jwtMessage);

    // Verify the created signature using jwtMessage fails, output is false
    Console.WriteLine(rsa.VerifyData(data, signatureBytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pss));
}

string jwtMessage = "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWUsImlhdCI6MTUxNjIzOTAyMn0";
string publicKey = @"-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu1SU1LfVLPHCozMxH2Mo
4lgOEePzNm0tRgeLezV6ffAt0gunVTLw7onLRnrq0/IzW7yWR7QkrmBL7jTKEn5u
+qKhbwKfBstIs+bMY2Zkp18gnTxKLxoS2tFczGkPLPgizskuemMghRniWaoLcyeh
kd3qqGElvW/VDL5AaWTg0nLVkjRo9z+40RQzuVaE8AkAFmxZzow3x+VJYKdjykkJ
0iT9wCS0DRTXu269V264Vf/3jvredZiKRkgwlL9xNAwxXFg0x/XFw005UWVRIkdg
cKWTjpBP2dPwVZ4WWC+9aGVd+Gyn1o0CLelf4rEjGoXbAAEgAqeGUxrcIlbjXfbc
mwIDAQAB
-----END PUBLIC KEY-----";
string privateKey = @"PLACEHOLDER, private key same pem format"; 
string jwtSignature;
using (var rsa = RSA.Create())
{
    rsa.ImportFromPem(privateKey);
    jwtSignature = Base64UrlEncoder.Encode(rsa.SignData(Encoding.UTF8.GetBytes(jwtMessage), HashAlgorithmName.SHA256, RSASignaturePadding.Pss));
}
using (var rsa = RSA.Create())
{    
    rsa.ImportFromPem(publicKey);
    var signatureBytes = Encoding.UTF8.GetBytes(Base64UrlEncoder.Decode(jwtSignature));
    var data = Encoding.UTF8.GetBytes(jwtMessage);

    // Verify the created signature using jwtMessage fails, output is false
    Console.WriteLine(rsa.VerifyData(data, signatureBytes, HashAlgorithmName.SHA256, RSASignaturePadding.Pss));
}

ERROR SUMMARY
    Below is a summary of the errors, details of these errors are listed later in the log.
    * Activation of \\Nas02\Software\AgentUI\AgentUI.application resulted in exception. Following failure messages were detected:
        + Exception occurred during store operation.
        + The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

ERROR SUMMARY
    Below is a summary of the errors, details of these errors are listed later in the log.
    * Activation of \\Nas02\Software\AgentUI\AgentUI.application resulted in exception. Following failure messages were detected:
        + Exception occurred during store operation.
        + The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

public partial class MainPage : ContentPage, INotifyPropertyChanged
{
    private List<Contact> _contacts;
    public List<Contact> Contacts { get => _contacts; set { _contacts = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Contacts")); } }
    public event PropertyChangedEventHandler PropertyChanged;
    public MainPage()
    {
        InitializeComponent();
        BindingContext = this;
    }
    private void Button_Clicked(object sender, EventArgs e)
    {
        Contacts = new List<Contact>
        {
            new Contact(){ Age = "24" }
        };
    }
}

public partial class MainPage : ContentPage, INotifyPropertyChanged
{
    private List<Contact> _contacts;
    public List<Contact> Contacts { get => _contacts; set { _contacts = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Contacts")); } }
    public event PropertyChangedEventHandler PropertyChanged;
    public MainPage()
    {
        InitializeComponent();
        BindingContext = this;
    }
    private void Button_Clicked(object sender, EventArgs e)
    {
        Contacts = new List<Contact>
        {
            new Contact(){ Age = "24" }
        };
    }
}

<VerticalStackLayout>
        <Button Text="ClickMe" Clicked="Button_Clicked"/>
        <ListView ItemsSource="{Binding Contacts}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <Label TextColor="White" BackgroundColor="Green" Text="{Binding Age}"/>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
</VerticalStackLayout>

<VerticalStackLayout>
        <Button Text="ClickMe" Clicked="Button_Clicked"/>
        <ListView ItemsSource="{Binding Contacts}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <Label TextColor="White" BackgroundColor="Green" Text="{Binding Age}"/>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
</VerticalStackLayout>

Process.Start(new ProcessStartInfo("tel:12345"));

Process.Start(new ProcessStartInfo("tel:12345"));

if(PhoneDialer.Default.IsSupported){
   PhoneDialer.Default.Open(phonenumber);
}

if(PhoneDialer.Default.IsSupported){
   PhoneDialer.Default.Open(phonenumber);
}