[Linq] Détecter de plusieurs instance d’un programme

Le fait d’avoir à détecter si un programme est déjà lancé est un problème récurant, donc comme on nombre de développeur je sors de temps en temps la snippet suivante

Vb

Public Shared Function IsNotFirstInstance() As Boolean
    Dim Apps As System.Diagnostics.Process() = System.Diagnostics.Process.GetProcesses()
    Dim App As System.Diagnostics.Process = System.Diagnostics.Process.GetCurrentProcess()
    Try
        For i As Int32 = 0 To i < Apps.Length
            If Apps(i).Id <> App.Id _
                AndAlso Apps(i).ProcessName = App.ProcessName Then
                Return True
        End If
        Next

         Return False
    Finally
        Apps = Nothing
        App = Nothing
    End Try
End Function

C#

public static Boolean IsNotFirstInstance()
{
    System.Diagnostics.Process[] Apps = System.Diagnostics.Process.GetProcesses();
    System.Diagnostics.Process App = System.Diagnostics.Process.GetCurrentProcess();
    try
    {
        for (Int32 i = 0; i < Apps.Length; i++)
        {
            if (Apps[i].Id != App.Id
                & Apps[i].ProcessName == App.ProcessName)
                return true;
        }
        return false;
    }
    finally
    {
        Apps = null;
        App = null;
    }
}

Mais avec linq le choses changent, et comme toujours dans le bon sens ;)

Vb

Public Shared Function IsNotFirstInstance() As Boolean
    Dim current As System.Diagnostics.Process = System.Diagnostics.Process.GetCurrentProcess()
    Try
        Return System.Diagnostics.Process.GetProcesses() _
            .Any(Function(c) c.ProcessName = current.ProcessName _
                AndAlso c.Id <> current.Id)
    Finally
        current = Nothing
    End Try
End Function

C#

public static Boolean IsNotFirstInstance()
{
    System.Diagnostics.Process current = System.Diagnostics.Process.GetCurrentProcess();
    try
    {
        return System.Diagnostics.Process.GetProcesses()
            .Any(c => c.ProcessName == current.ProcessName
                & c.Id != current.Id);
    }
    finally
    {
        current = null;
    }
}

après c’est une histoire de gouts, mais je trouve cela tout de même plus lisible.