Visual Studio 2010 C# "already defined a member with same parameter types error."

Question

im having a problem in visual studio it keeps saying i have defined a member with same parameter types. Im new to C# programming and i dont really know what to do. These are the errors that are occurring:

Error 1 Type 'Secret.AddPage' already defines a member called 'AddPage' with the same parameter types

Error 2 Type 'Secret.AddPage' already defines a member called 'PhoneApplicationPage_Loaded' with the same parameter types

Here is the code i have written so far any help is greatly appreciated.

enter code here

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using System.Device.Location;

namespace secret
{
public partial class AddPage : PhoneApplicationPage
{
    private string location = "";

    public AddPage()
    {
        InitializeComponent();

        GeoCoordinateWatcher myWatcher = new GeoCoordinateWatcher();
        var myPosition = myWatcher.Position;

        // Eftersom koden körs i emulatorn kan den inte få tillgång till riktiga GPS-värden
        // Därför hårdkodas koordinaterna till slottet i Gamla stan så att MSR MAPS Web Services
        //kan testas.

        double latitude = 40.717;
        double longitude = -74;

        if (!myPosition.Location.IsUnknown)
        {
            latitude = myPosition.Location.Latitude;
            longitude = myPosition.Location.Longitude;
        }

        myTerraService.TerraServiceSoapClient client = new myTerraService.TerraServiceSoapClient();

        client.ConvertLonLatPtToNearestPlaceCompleted += new EventHandler<myTerraService.ConvertLonLatPtToNearestPlaceCompletedEventArgs>(client_ConvertLonLatPtToNearestPlaceCompleted);

        client.ConvertLonLatPtToNearestPlaceAsync(new myTerraService.LonLatPt { Lat = latitude, Lon = longitude });
    }

    void client_ConvertLonLatPtToNearestPlaceCompleted(object sender, myTerraService.ConvertLonLatPtToNearestPlaceCompletedEventArgs e)
    {
        location = e.Result;

        //throw new NotImplementedException();
    }


    private void AppBar_Cancel_Click(object sender, EventArgs e)
    {
        navigateBack();
    }

    private void AppBar_Save_Click(object sender, EventArgs e)
    { // spara en ny anteckning

        if (location.Trim().Length == 0)
        {
            location = "Okänd";
        }

        navigateBack();

    }
    private void navigateBack()
    {
        NavigationService.Navigate(new Uri("/secret;component/NotesMainPage.xaml", UriKind.Relative));
    }

    private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        editTextBox.Focus();

    }
}
}

Answer 1

You are creating a partial class, so you probably have these members defined in another source file for your partial class.

You may look at the solution explorer, find that source file and either remove it from there or you may remove these members from your current partial class.

You may see: Partial Classes and Methods (C# Programming Guide)

To search for the other source file containing the partial class, right click on the Class Name AddPage and select Go to Definition. You will see multiple results in Find Symbol result window in visual studio.

Answer 2

Check for another partial class in which you've already defined the AddPage() constructor or PhoneApplicationPage_Loaded() methods. You can achieve this by Ctrl+F and searching the solution for the method signatures:

public AddPage()

and

PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)