How do I determine if a .NET application is 32 or 64 bit?

Question

I have a .NET application that was supposed to be compiled as a 32-bit only application. I suspect my build server isn\'t actually doing it.

How do I determine if a .NE

Answer 1

I use the following code:

[DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool IsWow64Process(
    [In] IntPtr hProcess,
    [Out] out bool wow64Process
);

With:

public static bool IsProcess64(Process process)
{
    if ((Environment.OSVersion.Version.Major == 5 && Environment.OSVersion.Version.Minor >= 1) || Environment.OSVersion.Version.Major >= 6) {
        bool ret_val;

        try {
            if (!WindowsAPI.IsWow64Process(process.Handle,out ret_val)) ret_val = false;
        } catch {
            ret_val = false;
        }

        if (!ret_val && IntPtr.Size == 8) {
            return true;
        } else {
            return false;
        }
    } else {
        return false;
    }
}

You can pass Process.CurrentProcess or similar to this.