Add module initializer to opportunistically fold cctor checks

src/FastCache.Cached/CacheStaticHolder.cs

@@ -1,7 +1,33 @@
+using FastCache.Collections;
+using FastCache.Extensions;
+using FastCache.Helpers;
+using FastCache.Services;
 using NonBlocking;
 
 namespace FastCache;
 
+#if NET5_0_OR_GREATER
+#pragma warning disable CA2255 // Static initialization to ensure cctor checks are removed in JITted code
+internal static class CacheStaticHolder
+{
+    [ModuleInitializer]
+    public static void Initialize()
+    {
+        RuntimeHelpers.RunClassConstructor(typeof(Constants).TypeHandle);
+        RuntimeHelpers.RunClassConstructor(typeof(CacheStaticHolder<,>).TypeHandle);
+        RuntimeHelpers.RunClassConstructor(typeof(CacheManager).TypeHandle);
+
+        RuntimeHelpers.RunClassConstructor(typeof(Cached<,>).TypeHandle);
+        RuntimeHelpers.RunClassConstructor(typeof(Cached).TypeHandle);
+        RuntimeHelpers.RunClassConstructor(typeof(CachedExtensions).TypeHandle);
+        RuntimeHelpers.RunClassConstructor(typeof(CachedRange).TypeHandle);
+
+        RuntimeHelpers.RunClassConstructor(typeof(TimeUtils).TypeHandle);
+    }
+}
+#pragma warning restore CA2255
+#endif
+
 internal static class CacheStaticHolder<K, V> where K : notnull
 {
     internal static readonly ConcurrentDictionary<K, CachedInner<V>> Store = new(concurrencyLevel: 1, capacity: 1048576);