C# Instance Detection

InstanceDetector.cs

using System.Diagnostics;

public class InstanceDetector
{
    protected Process GetCurrentProcess()
    {
        return Process.GetCurrentProcess();
    }

    protected Process[] GetRunningProcesses()
    {
        return Process.GetProcesses();
    }

    public bool IsAnotherInstanceRunning()
    {
        var current = this.GetCurrentProcess();

        foreach (var process in this.GetRunningProcesses())
        {
            if (process.ProcessName == current.ProcessName && process.Id != current.Id)
                return true;
        }

        return false;
    }
}