This exception occurs when .NET tries to load a DLL or executable that is either corrupt or invalid for the platform on which you are running.

public class BadImageFormatException : SystemException {
// Public Constructors
   public BadImageFormatException( );
   public BadImageFormatException(string message);
   public BadImageFormatException(string message, Exception inner);
   public BadImageFormatException(string message, string fileName);
   public BadImageFormatException(string message, string fileName, Exception inner);
// Protected Constructors
   protected BadImageFormatException(System.Runtime.Serialization.SerializationInfo info, 
        System.Runtime.Serialization.StreamingContext context);
// Public Instance Properties
   public string FileName{get; }
   public string FusionLog{get; }
   public override string Message{get; } 
// overrides Exception
// Public Instance Methods
   public override void GetObjectData(System.Runtime.Serialization.SerializationInfo info,
        System.Runtime.Serialization.StreamingContext context);  
// overrides Exception
   public override string ToString( );    
// overrides Exception
}

Hierarchy

Object Exception(System.Runtime.Serialization.ISerializable) SystemException BadImageFormatException