Organize products into arrays

I have a list of over 1,000 products that I would like to read line by line and put each product into an array.
for example all shirts into one array and all shoes into an array.. how can I do this?
Daniel SufreAsked:
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Jacques Bourgeois (James Burger)PresidentCommented:
Where does that list comes from?

In what format is the data?

Are you in Visual Basic or C#?
Daniel SufreAuthor Commented:
they are all inside a ConcurrentDictionary in
Fernando SotoRetiredCommented:
What is the data structure of the products that are in the dictionary?
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Daniel SufreAuthor Commented:
the key ex: 598659659 then the name like "Shirt Blue Short Sleeves"
Fernando SotoRetiredCommented:
So your ConcurrentDictionary object is defined with a key of type integer and a value of type string something like this, ConcurrentDictionary<int, string>, is that correct?

Now the value having a type string with a value like this, "Shirt Blue Short Sleeves", so is the product type ALWAYS the first word in the string?
Daniel SufreAuthor Commented:
that's correct..
but if it makes things more simple I can make it Concurrent.ConcurrentDictionary(Of String, String())
and key=123456, value1=shirt, value2=brand and model
Fernando SotoRetiredCommented:
No need I just wanted to make sure where the product type was located in the Value string. Seeming that a List of objects is a type safe object would that be better for the collection of products? Seeming that you will be creating the collections at run time as per your statement, "put each product into an array. for example all shirts into one array and all shoes into an array", How will you be identifying each collection? Will you have predefined Array's/List to be filled? Or will you check the first entry and determine what type of list it is or something else.
Daniel SufreAuthor Commented:
i am okay with what makes things faster..
Fernando SotoRetiredCommented:
Hi Daniel;

The following code snippet should do what you need.
// The results of this Linq query is a dictionary with the 
// key as the product name and its value being a List<string> 
// with the complete product discription. The variable conDictionary
// is your ConcurrentDictionary<int, string> object.
Dictionary<string, List<string>> prodList = 
    (from prod in conDictionary.Values
     group prod by prod.Substring(0, prod.IndexOf(" ")) into prodGroup
     select prodGroup.Cast<String>().ToList()).ToDictionary(p => p[0].Substring(0, p[0].IndexOf(" ")));

// Look up a product in the dictionary and display all its products
string lookUpProduct = "Shirt3";
if( prodList.ContainsKey(lookUpProduct) )
    foreach (string prod in prodList[lookUpProduct])
    Console.WriteLine("Product {0} is not in the list of products", lookUpProduct);        

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