I have requirement of passing an array of strings from a C# module to my C++ COM component. The following is the idl declaration;

```
[id(11), helpstring("method deleteObjectsEx")] HRESULT deleteObjectsEx(
                [in] BSTR userName,
                [in] BSTR userPasswd, 
                [in] SAFEARRAY(VARIANT) varValues, 
                [in] BSTR deleteMode
                );

```

And from the C# we use the following code to invoke the API 

```
List<string> ObjectIDS = new List<string>();
ObjectIDS.Add(obj._ObjectId[0]);
ObjectIDS.Add(obj._ObjectId[1]);

/*Array ar = Array.CreateInstance(typeof(string), size);
ar.SetValue(obj._ObjectId[0], 0);
ar.SetValue(obj._ObjectId[1], 1);*/

mhubBridge.deleteObjectsEx(Encrypt(auth.UserName), 
                           Encrypt(auth.UserPassword), 
                           ObjectIDS.ToArray(),
                           obj._delMEthod);

```

On invoking the deleteObjectsEx API i get "A first chance exception of type 
`System.Runtime.InteropServices.SafeArrayTypeMismatchException occurred in IPDWebService.DLL
IPDWS::trace::(Tuesday, 06 August 2013 13:27): Exception in deleteObjectsEx:: message - Specified array was not of the expected type.`