LargeCollections is a library for .NET framework that offers a number of interfaces and types for collections that can store up to 1152921504606846976 items. In comparison many .NET standard collections are limited to about 2.1 billion items.

Currently supported collections are:

• LargeArray
• LargeList
• LargeSet
• LargeDictionary<TKey, TValue>
• DiskCache<TKey, TValue>
• SpatialDiskCache<long, TValue>

DiskCache<TKey, TValue> is a dictionary-like collection that allows to limit the amount of memory (RAM) in MB that will be used. Any memory requirement that exceeds this amount is automatically swapped out to disk. Additionally it offers multi-threaded operations for performance improvements.

SpatialDiskCache<long, TValue> is a DiskCache<long, TValue> that allows to create a spatial index for the contained elements that can be used for spatial queries.

Since many .NET API are designed to work with Streams the LargeWritableMemoryStream implements a thin Stream API wrapper around a LargeList. On the other side LargeReadableMemoryStream implements a thin readonly Stream API wrapper around a IReadOnlyLargeArray.

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