Update README.md

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ClemensFischer 2024-02-05 10:38:29 +01:00
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@ -30,11 +30,13 @@ which define the currently displayed map viewport.
---
The **TileImageLoader** class uses an implementation of
The **TileImageLoader** class uses
[IDistributedCache](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.caching.distributed.idistributedcache?view=dotnet-plat-ext-8.0)
for optional caching of map tile bitmaps.
for optional caching of map tile bitmaps. By default, the cache is a
[MemoryDistributedCache](https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.caching.distributed.memorydistributedcache?view=dotnet-plat-ext-8.0).
instance with all default options.
Map Control comes with three such implementations:
Map Control provides three IDistributedCache implementations for persistent caching:
* ImageFileCache, an IDistributedCache implementation that stores each cached map tile as a single image file,
in the original file format delivered by the map provider (typically PNG or JPG). ImageFileCache is part of
the MapControl library.