How do I instantiate a structure array within a structure?

Error: (2nd line above) Invalid token "=" in struct  

Which line? Copy and paste your line so I can see it.

If you want to do compile time inits, you can use a constructor:
internal struct bookInfoByVenue
    {
        internal bookInfoByVenue(string name, bool newB, decimal pr)
        {
            venueName = name;
            newBook = newB;
            price = pr;
        }
        internal string venueName;
        internal bool newBook;
        internal decimal price;
    };
pd.bookInfo = new bookInfoByVenue[] {new bookInfoByVenue( "2324-2222-1", false, 23.99M), new bookInfoByVenue("3445-1111-4", true, 54.99M)};

2nd line...

            pricingData pd = new pricingData();
            pd.venueBookInfo = new bookInfoByVenue[100]; 

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You must have a typo somewhere. Double check the lines before it and your struct declaration, cause I have it working in VS.

this is what I have... the errors are as follows:

Error      1      Invalid token '=' in class, struct, or interface member declaration
Error      2      Array size cannot be specified in a variable declaration (try initializing with a 'new' expression)
Error      3      Invalid token ';' in class, struct, or interface member declaration

        public struct pricingData  //  structure to hold the data obtained on a book
        {
            public string ISBN;
            public decimal listPrice;
            public bookInfoByVenue[] venueBookInfo;
        }
        public struct bookInfoByVenue
        {
            public string venueName;
            public bool newBook;
            public decimal price;
        }
 
            pricingData pd = new pricingData();
            pd.venueBookInfo = new bookInfoByVenue[5]; <--- all errors refer to this line       

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but are lines 14 and 15 inside a method somewhere? They can't just be hanging inside a namespace or something. You just have a compile error somewhere.

Hmmm... you're right... they are after the declarations of the structure... can I put them inside the first structures constructor?  or should they be in a method?  (the problem with putting them in a method is that the method is called thousands of times, and I'm afraid I'll run out of memory!

Thank you so much... I've learned a lot... wish I could give you more points, but I can't...

Thanks again...