Compilation error

[grd974]

After editing a strategy named "FibSound1" I clicked on Finish button then I got "Error on generating Strategy". Under the code, I found this diagnosis :
Description : The namespace 'NinjaTrader.Indicator' already contains a definition for 'DepthReferenceSample'
File : DepthReferenceSample.cs Line : 19 Column : 18

Here are the first lines of my code :

#region Using declarations
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Indicator;
using NinjaTrader.Strategy;
#endregion

// This namespace holds all strategies and is required. Do not change it.
namespace NinjaTrader.Strategy
{
/// <summary>
/// Sounds Fibonacci retracements
/// </summary>
[Description("Sounds Fibonacci retracements")]
[Gui.Design.DisplayName("FibSound1")]
public class FibSound1 : Strategy

I went back to Edit and deleted the DepthReferenceSample (that you recently uploaded on this forum). I renewed the compilation and it went right.
I've had this very problem several times before and I did not put it on the forum because I was not sure whether I had imported the DepthReferenceSample properly; but now DepthReference indicator works on my chart and I am sure the problem comes from the compilation process.

[NinjaTrader_Dierk]

>> The namespace 'NinjaTrader.Indicator' already contains a definition for 'DepthReferenceSample'
Means: there are two different files holding 2 classes with the same name: 'DepthReferenceSample'

[grd974]

I've cleaned up my directories and compilation works fine, thanks.