C# Help: A local variable is already defined in this scope.?

I am brand new to C# programming. And I am struggling to figure out what I have done wrong.

The problem is in my string declaration for the variable that will be returned. The error I receive is "a local variable named 'seconds' is already defined in this scope. I haven't been able to come up with a way to solve this problem. I'm sure it's me being an idiot... but I can't find it.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace Mumby_iLab5

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

public void btnConvert_Click(object sender, EventArgs e)

{

int seconds = Convert.ToInt32(txtSeconds.Text);

this.lblOutputMinutes.Text = Minutes();

this.lblOutputHours.Text = Hours();

}

public string Minutes()

{

throw new NotImplementedException();

int seconds = Convert.ToInt32(txtSeconds.Text);

int minutes = (seconds / 60);

int secondsR = (seconds % 60);

string minutesText = "{0:n} second(s) is {1:n} minute(s) and {2} second(s).", seconds, minutes, secondsR; //this is where the error occurs

return minutesText;

}

public string Hours()

{

throw new NotImplementedException();

int seconds = Convert.ToInt32(txtSeconds.Text);

int hours = (seconds / 60) / 60;

int minutes = (seconds / 60) - 60;

int secondsR = seconds - (3600 * hours) - (60 * minutes);

string hoursText = "{0:n} second(s) is {1:n} hour(s), {2} minute(s) and {3} second(s).", seconds, hours, minutes, secondsR; //and also here

return hoursText;

}

private void btnClear_Click(object sender, EventArgs e)

{

//Clears text box and restores labels.

txtSeconds.Clear();

lblOutputMinutes.Text = "Seconds Converted to Minutes";

lblOutputHours.Text = "Seconds Converted to Hours";

}

private void btnExit_Click(object sender, EventArgs e)

{

//Terminates the program

this.Close();

}

}

}