Clarify compatibility with arrays in GetCollectionItemType()

src/AppMotor.Core/Extensions/TypeExtensions.cs

@@ -230,6 +230,9 @@ public static bool IsNullableValueType(this Type type)
     /// Returns the item type if this type is a collection (i.e. inheriting from <see cref="IEnumerable{T}"/>).
     /// Returns <c>null</c> if this type is not a collection type or not a generic collection type.
     /// </summary>
+    /// <remarks>
+    /// This method also works if this type is an array type.
+    /// </remarks>
     /// <exception cref="AmbiguousMatchException">Thrown if this type implements <see cref="IEnumerable{T}"/> multiple
     /// times with different type arguments.</exception>
     [MustUseReturnValue]

tests/AppMotor.Core.Tests/Tests/Extensions/TypeExtensionsTests.cs

@@ -239,6 +239,7 @@ public void Test_GetCollectionItemType()
     {
         typeof(List<string>).GetCollectionItemType().ShouldBe(typeof(string));
         typeof(IReadOnlyCollection<int>).GetCollectionItemType().ShouldBe(typeof(int));
+        typeof(bool[]).GetCollectionItemType().ShouldBe(typeof(bool));
 
         typeof(StringComparer).GetCollectionItemType().ShouldBe(null);