The bussiness-designers csharp file gets corrupted by not putting a space between "namespace" and the <namespace name>
namespaceWindowsApplication1{
public
{
#region
1.) Open the Busines Object Mapper within the appropriate solution2.) Click on the first project that needs to be updated3.) Click the "Modify Project Properties" link on the right panel4.) Set the "Default Namespace" to the root namespace of the CSharp project (or whatever namespace you want the BO to have)5.) When prompted, select "Change All" to update all existing business objects.The next time you rebuild this will not happen and all future business objects will have the default namespace you just specified.