Get all the keys in Array of Dictionary

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Category:Languages

I have an array of dictionaries as Follows:

Dictionary<int, int>[] matrix = new Dictionary<int, string>[10]; 

I need all the keys saved in this dictionary which I am using in a foreach loop as below:

 foreach (int key in matrix.Keys)   {    } 

Obviously, matrix.Keys won't work here. So,is there any way to get all the keys of dictionary without looping through the whole array (maybe Linq or something)?


 var allKeys = matrix.SelectMany(d => d.Keys);   foreach (int key in allKeys) ... 

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