I have a RESTful WCF web service.

One of my methods has several input parameters.

One of the input parameters is a string. Some times the data I am passing to this web method will include content that has one or more "illegal characters" - i.e. "&". So, I replace this with & before passing it to the web service - but it still throws an exception. The exception isn't visible, as the data never reaches the web service, but I know that it is this content that is causing the problem, as I have done several tests sending data that doesn't contain an illegal XML character, and every time it worked, but any data containing "&" will fail. Am I not supposed to replace "&" with &?

Please refer to the web method below:

[WebGet]
    public MapNode AddMapNode(string nodeText)
    {
        return new inProcessEntities().AddMapNode(nodeText);
    }

Please help on how I can fix this.

Thanks.

Chris