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POwhich collection type to use in .NET 4.5?
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copied!<p>I have been using VB.net (very old versions) for quite a while but not in the last 7-8 years. I have VS 2012 and .net 4.5 and it is clear that they have added a dizzying array (no pun intended) of collections. I have read and read on the net but am really more confused than before.</p> <p>I would like some recommendations on what type of collection to use.</p> <p>I have CAD entities that have: a handle (a hexadecimal text string up to 16 characters) a start point (a custom object with an X,Y and Z coordinate) (optional) an end point (a custom object with an X,Y and Z coordinate)</p> <p>For my purposes here I want to be able to retrieve (and delete) all entities that share a certain handle OR a certain start or end point:</p> <pre><code>if handle = 345 OR if point = start point OR if point = end point </code></pre> <p>I expect to have up to a couple thousand entities and will be "chaining" them. What I mean by chaining is to assemble then in a "chain" end to end. I will end up with one to many fragments of entities that form a chain.</p> <p>I have a logic worked out that passes the collection of entities one time only and results in a chained result. It depend upon doing the finding using the criteria above.</p> <p>Edit...extremely simplified actual data might look like this:</p> <pre><code>Handle: 110 Start point x: 23.17 Start point y: 18.29 End point x: 32.5 End point y: 30.72 Handle: 111 Start point x: 40.12 Start point y: 18.32 Handle: 112 Start point x: 40.12 Start point y: 40.12 End point x: 100.1 End point y: 83.2 Handle: 113 Start point x: 40.12 Start point y: 18.32 End point x: 32.5 End point y: 30.72 </code></pre> <p>These would end up chained in this order:</p> <pre><code>Handle: 110 Start point x: 23.17 Start point y: 18.29 End point x: 32.5 End point y: 30.72 Handle: 113 Start point x: 40.12 Start point y: 18.32 End point x: 32.5 End point y: 30.72 Handle: 111 Start point x: 40.12 Start point y: 18.32 Handle: 112 Start point x: 40.12 Start point y: 40.12 End point x: 100.1 End point y: 83.2 </code></pre> <p>What collection would you vb.net experts recommend?</p>

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