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A lookup (table) is an array that replaces run-time computation with a simpler array indexing operation. The savings in terms of processing time can be significant, since retrieving a value from memory is often faster than undergoing an 'expensive' computation or input/output operation. Over time the definition has become less strict, any kind of searching with a key value can be considered a lookup.

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Returning a value based on a lookup

This will add the use of LINQ to clean up the code the way you want: private TreeNode GetNodeAddress(cls_Transactions trPassedInTransaction) { //a predicate to pass to the FirstOrDefault method …
m.t.bennett's user avatar