How to determine if your ASP.NET application is running as a 32-bit or 64-bit application

When I was first asked this question, I thought to look at the System.IntPtr struct. On further investigation, I found a very simple technique suggested by Perica Zivkovic.

Here’s how to determine if your ASP.NET application is running as a 32-bit or 64-bit application

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (IntPtr.Size == 8)
    {
        Response.Write("Running as a 64-bit app");
    }
    else if (IntPtr.Size == 4)
    {
        Response.Write("Running as a 32-bit app");
    }

}

VB.NET

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If IntPtr.Size = 8 Then
        Response.Write("Running as a 64-bit app")
    ElseIf IntPtr.Size = 4 Then
        Response.Write("Running as a 32-bit app")
    End If

End Sub

Note: There could be a possibility that you are running a 32-bit .NET Framework on a 64-Bit Windows OS. Check a cool technique described by Raymond How to detect programmatically whether you are running on 64-bit Windows

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal