I have a utils class library project that includes some Sharepoint functionality. The project references `Microsoft.Sharepoint.dll` (copy local is set to false). We have many other projects that reference our utils dll and whenever we build them `Microsoft.Sharepoint.Sandbox.dll` is copied to the bin folder of these apps. Then when running any of the apps I get the following error: 

```
Could not load file or assembly 'Microsoft.Sharepoint.Sandbox' or one of its dependencies. An attempt was made to load a program with an incorrect format.

```

Deleting the dll fixes the problem..
Is there a way to stop this Microsoft.Sharepoint.Sandbox.dll from being copied into the bin folder? **I don't want to use post build scripts** because there are many projects that reference the utils project and we will still have to manually delete the dll when deploying.

I can reproduce as follows: 

1) Create a new solution

2) Add a class library project called utils

3) Reference Microsoft.Sharepoint.dll

4) Class1.cs: 

```
namespace Utils
{
    public class Class1
    {

        public void testMeth()
        {
            Microsoft.SharePoint.DefaultItemOpen c; 
        }
    }
}

```

5) Add a new web project to the solution (WebApplication1)

6) Reference the Utils project and try to run WebApplication1

**Edit:** Microsoft.Sharepoint.Sandbox is a 64bit dll but I need to target Any CPU.

***Is there no way to tell VS to stop pulling across implict references?***