WiX Custom Action Project - BadImageFormatException Exception

I am developing my first custom action, but I cannot load the resulting .CA.dll file. This is the simplest process, and the result:

I create a custom action project and keep all the defaults. The class is as follows:

using Microsoft.Deployment.WindowsInstaller;
namespace CustomAction
{
public class CustomActions
{
[CustomAction]
    public static ActionResult CustomAction1(Session session)
    {
        session.Log("Begin CustomAction1");

        return ActionResult.Success;
    }
}
}

Then I create an assembly (either in debugging or in release) that creates the CustomAction.CA.dll file for me. Then I will try to run this test:

[TestMethod]
    public void LoadAssembly()
    {
        Assembly.LoadFrom(@"D:\CustomAction\bin\Debug\CustomAction.CA.dll");
    }

And you get an error: System.BadImageFormatException: Failed to load the file or assembly file: /// D: \ CustomAction \ bin \ Debug \ CustomAction.CA.dll or one of its dependencies. The module is expected to contain an assembly manifest.

I also cannot reference a custom action from my WiX project. Awesome!

: , VS, :
TmiDataManager.TryConvertPropertyValueToDisplayText: , . System.FormatException: .
System.Number.StringToNumber( String str, NumberStyles, NumberBuffer & number, NumberFormatInfo info, Boolean parseDecimal)
  System.Number.ParseInt32 (String s, NumberStyles style, NumberFormatInfo info)
  System.String.System.IConvertible.ToInt32 ( IFormatProvider)
  System.Convert.DefaultToType( IConvertible, targetType, IFormatProvider)
  System.String.System.IConvertible.ToType( , IFormatProvider)
  System.ComponentModel.EnumConverter.ConvertTo(ITypeDescriptorContext , CultureInfo, , destinationType)
  System.ComponentModel.TypeConverter.ConvertToString( ) "

: CustomAction.dll Assembly.LoadFrom, , , BadImageFormat? - , - WiX?