Add Microsoft.Extensions.Caching.Memory package.md details

diff --git a/src/libraries/Microsoft.Extensions.Caching.Memory/src/PACKAGE.md b/src/libraries/Microsoft.Extensions.Caching.Memory/src/PACKAGE.md
index baa592831d4977780969d7f42338dcd979c5ffb0..8798aa1ff8f38fe4386720ca7ef1b139d3bce04f 100644 (file)
--- a/src/libraries/Microsoft.Extensions.Caching.Memory/src/PACKAGE.md
+++ b/src/libraries/Microsoft.Extensions.Caching.Memory/src/PACKAGE.md
@@ -2,43 +2,88 @@
 
 <!-- A description of the package and where one can find more documentation -->
 
-
+Provides implementations for local and distributed in-memory cache. It stores and retrieves data in a fast and efficient way.
 
 ## Key Features
 
 <!-- The key features of this package -->
 
-*
-*
-*
+* A concrete implementation of the IMemoryCache interface, which represents a local in-memory cache that stores and retrieves data in a fast and efficient way
+* A distributed cache that supports higher scale-out than local cache
+* Expiration and eviction policies for its entries
+* Entry prioritization for when the cache size limit is exceeded and needs to be compacted by entry eviction
+* Track of cache statictics
 
 ## How to Use
 
 <!-- A compelling example on how to use this package with code, as well as any specific guidelines for when to use the package -->
 
+Use Microsoft.Extensions.Caching.Memory over System.Runtime.Caching when working with ASP.NET Core as it provides better integration support. For example, IMemoryCache works natively with ASP.NET Core dependency injection.
+
+Local in-memory serialization:
+```csharp
+using Microsoft.Extensions.Caching.Memory;
+
+using MemoryCache cache = new(new MemoryCacheOptions());
+
+object valueToCache = new();
+string key = "key";
+
+using (ICacheEntry entry = cache.CreateEntry(key))
+{
+    // Entries are committed after they are disposed therefore it does not exist yet.
+    Console.WriteLine($"Exists: {cache.TryGetValue(key, out _)}\n");
+
+    entry.Value = valueToCache;
+    entry.SlidingExpiration = TimeSpan.FromSeconds(2);
+}
+
+bool exists = cache.TryGetValue(key, out object? cachedValue);
+Console.WriteLine($"Exists: {exists}" );
+Console.WriteLine($"cachedValue is valueToCache? {object.ReferenceEquals(cachedValue, valueToCache)}\n");
+
+Console.WriteLine("Wait for the sliding expiration...");
+Thread.Sleep(TimeSpan.FromSeconds(2));
+
+Console.WriteLine("Exists: " + cache.TryGetValue(key, out _));
+
+// You can also use the acceleration extensions to set and get entries
+string key2 = "key2";
+object value2 = new();
+
+cache.Set("key2", value2);
+
+object? cachedValue2 = cache.Get(key2);
+Console.WriteLine($"cachedValue2 is value2? {object.ReferenceEquals(cachedValue2, value2)}");
+```
+
 ## Main Types
 
 <!-- The main types provided in this library -->
 
 The main types provided by this library are:
 
-* ``
-* ``
-* ``
+* `Microsoft.Extensions.Caching.Memory.MemoryCache`
+* `Microsoft.Extensions.Caching.Memory.MemoryCacheOptions`
+* `Microsoft.Extensions.Caching.Distributed.MemoryDistributedCache`
+* `Microsoft.Extensions.Caching.Memory.MemoryDistributedCacheOptions`
 
 ## Additional Documentation
 
 <!-- Links to further documentation. Remove conceptual documentation if not available for the library. -->
 
-* [Conceptual documentation](https://learn.microsoft.com/en-us/dotnet/standard/serialization/**LIBRARYNAME**/overview)
-* [API documentation](https://learn.microsoft.com/en-us/dotnet/api/**LIBRARYNAME**)
+* [Conceptual documentation](https://learn.microsoft.com/dotnet/core/extensions/caching)
+* [Cache in-memory in ASP.NET Core](https://learn.microsoft.com/en-us/aspnet/core/performance/caching/memory)
+* [API documentation](https://learn.microsoft.com/dotnet/api/microsoft.extensions.caching.memory)
 
 ## Related Packages
 
 <!-- The related packages associated with this package -->
 
+[Microsoft.Extensions.Caching.Abstractions](https://www.nuget.org/packages/Microsoft.Extensions.Caching.Abstractions)
+
 ## Feedback & Contributing
 
 <!-- How to provide feedback on this package and contribute to it -->
 
-Microsoft.Extensions.Caching.Memory is released as open source under the [MIT license](https://licenses.nuget.org/MIT). Bug reports and contributions are welcome at [the GitHub repository](https://github.com/dotnet/runtime).
\ No newline at end of file
+Microsoft.Extensions.Caching.Memory is released as open source under the [MIT license](https://licenses.nuget.org/MIT). Bug reports and contributions are welcome at [the GitHub repository](https://github.com/dotnet/runtime).