DataPortal method call reflection finds wrong method

[kmreid]

I have 2 Child_Create methods with the same number of parameters, but different param types:

   protected void Child_Create(IProduct product, int location, decimal quantity, ICustomer cust)
    {                     
        base.Child_Create(product, location, quantity, cust);     
    }

    protected void Child_Create(int productId, int location, decimal quantity, ICustomer cust)
    {            
        var prod = ProductLoader.Load(productId);           
        base.Child_Create(prod, location, quantity, cust);  
    }

My code creates the child like this:

public static T New(int productId, int locationId, decimal quantity = 1, ICustomer cust = null)
{
    ...
    DataPortal.CreateChild<T>(productId, locationId, quantity, cust);
    ...
}

This throws an exception:

System.InvalidCastException : Unable to cast object of type 'System.Int32' to type 'MyProject.IProduct'.

I removed the cust parameter from the 1st Child_Create method, and it works - it is able to find the correct Child_Create method (the 2nd one).

Why is this happening? Is the method caller using the number of parameters to identify the method to call, and ignoring the types?

[rockfordlhotka]

It is possible that there's a bug in MethodCaller. I know the number of parameters factors into the code, but it also does (or should) look at the parameter types as well.