Before renaming the property CodeProvider

        
private CodeDomProvider codeDomProvider;

protected virtual CodeDomProvider CodeProvider
{
    get {return codeDomProvider;}
}

after rename the property CodeProvider to the CodeDomProvider with renaming backing field

        
private CodeDomProvider codeDomDomDomProvider;

protected virtual CodeDomProvider CodeDomProvider
{
    get {return codeDomDomDomProvider;}
}