Can a TargetInvocationException thrown from reflection have a null InnerException

Whilst browsing the source code for System.ComponentModel.DataAnnotations.CustomValidationAttribute here, I saw the following code (shortened):

try
{
    methodInfo.Invoke(null, methodParams);
}
catch (TargetInvocationException ex)
{
    if (ex.InnerException != null)
    {
        throw ex.InnerException
    }
    throw;
}

Here, the code checks if ex.InnerException is null. I didn't think that a TargetInvocationException could ever have a null InnerException if it was thrown from reflection invocation.

Is this possible? If so, please provide a scenario where the InnerException can be null.