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

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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, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.