System.UnauthorizedAccessException: 'Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))'

Hello I am working on VPN in C# this is my code

VpnManagementAgent vpnManagementAgent = new VpnManagementAgent();
        VpnManagementAgent mgr = vpnManagementAgent;
        VpnNativeProfile profile = new VpnNativeProfile()
        {
            AlwaysOn = false,
            NativeProtocolType = VpnNativeProtocolType.IpsecIkev2,
            ProfileName = "MyConnection",
            RememberCredentials = true,
            RequireVpnClientAppUI = true,
            RoutingPolicyType = VpnRoutingPolicyType.SplitRouting,
            TunnelAuthenticationMethod = VpnAuthenticationMethod.Certificate,
            UserAuthenticationMethod = VpnAuthenticationMethod.Mschapv2,
        };
        profile.Servers.Add("serveAddress");
        VpnManagementErrorStatus profileStatus = await mgr.AddProfileFromObjectAsync(profile);
        PasswordCredential credentials = new PasswordCredential
        {
            UserName = "username",
            Password = "Abc",
        };
        VpnManagementErrorStatus connectStatus = await mgr.ConnectProfileWithPasswordCredentialAsync(profile, credentials);

i add all this code on button action. now when i start VPN connection this line throw exception

VpnManagementErrorStatus profileStatus = await mgr.AddProfileFromObjectAsync(profile);

Exception is

 System.UnauthorizedAccessException: 'Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))'

StackTrace:

at Windows.Networking.Vpn.VpnManagementAgent.AddProfileFromObjectAsync(IVpnProfile profile)
at App1.MainPage.<Button_Click>d__2.MoveNext() in C:\Users\HP\source\repos\StarkVPnTesting\App1\MainPage.xaml.cs:line 62

I believe you need to add the App Capability "networkingVpnProvider" as per the below:

This link describes the significance and how to apply App Capabilities MSDN App Capability. Ultimately you will need to add the below to your app package manifest source file (Package.appxmanifest).

<?xml version="1.0" encoding="utf-8"?>
<Package
    ...
    xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
    IgnorableNamespaces="... rescap">
...
<Capabilities>
    <rescap:Capability Name="networkingVpnProvider"/>
</Capabilities>
</Package>

Note that this is a Windows 10 requirement as per the documentation for the method: VpnManagementAgent.AddProfileFromObjectAsync(IVpnProfile) Method