diff --git a/X10D.Tests/src/Collections/ArrayTests.cs b/X10D.Tests/src/Collections/ArrayTests.cs
index 29c6472..02784f4 100644
--- a/X10D.Tests/src/Collections/ArrayTests.cs
+++ b/X10D.Tests/src/Collections/ArrayTests.cs
@@ -13,7 +13,7 @@ public class ArrayTests
     [DataRow(true)]
     public void AsArrayShouldGiveLength1(object o)
     {
-        object[] array = o.AsArray()!;
+        object[] array = o.AsArrayValue()!;
         Assert.IsNotNull(array);
         Assert.IsTrue(array.Length == 1);
     }
@@ -24,7 +24,7 @@ public class ArrayTests
     [DataRow(true)]
     public void AsArrayShouldContainObject(object o)
     {
-        object[] array = o.AsArray()!;
+        object[] array = o.AsArrayValue()!;
         Assert.IsNotNull(array);
         Assert.AreEqual(o, array[0]);
     }
diff --git a/X10D.Tests/src/Core/CoreTests.cs b/X10D.Tests/src/Core/CoreTests.cs
index 35e9f53..0084c43 100644
--- a/X10D.Tests/src/Core/CoreTests.cs
+++ b/X10D.Tests/src/Core/CoreTests.cs
@@ -9,18 +9,18 @@ public class CoreTests
     [TestMethod]
     public void AsArrayShouldBeLength1()
     {
-        Assert.AreEqual(1, 0.AsArray().Length);
-        Assert.AreEqual(1, string.Empty.AsArray().Length);
-        Assert.AreEqual(1, true.AsArray().Length);
-        Assert.AreEqual(1, ((object?)null).AsArray().Length);
+        Assert.AreEqual(1, 0.AsArrayValue().Length);
+        Assert.AreEqual(1, string.Empty.AsArrayValue().Length);
+        Assert.AreEqual(1, true.AsArrayValue().Length);
+        Assert.AreEqual(1, ((object?)null).AsArrayValue().Length);
     }
     
     [TestMethod]
     public void AsEnumerableShouldBeLength1()
     {
-        Assert.AreEqual(1, 0.AsEnumerable().Count());
-        Assert.AreEqual(1, string.Empty.AsEnumerable().Count());
-        Assert.AreEqual(1, true.AsEnumerable().Count());
-        Assert.AreEqual(1, ((object?)null).AsEnumerable().Count());
+        Assert.AreEqual(1, 0.AsEnumerableValue().Count());
+        Assert.AreEqual(1, string.Empty.AsEnumerableValue().Count());
+        Assert.AreEqual(1, true.AsEnumerableValue().Count());
+        Assert.AreEqual(1, ((object?)null).AsEnumerableValue().Count());
     }
 }
diff --git a/X10D.Tests/src/Core/EnumerableTests.cs b/X10D.Tests/src/Core/EnumerableTests.cs
index d3b4341..5b6deba 100644
--- a/X10D.Tests/src/Core/EnumerableTests.cs
+++ b/X10D.Tests/src/Core/EnumerableTests.cs
@@ -12,7 +12,7 @@ public class EnumerableTests
     [DataRow(true)]
     public void AsEnumerable_ShouldWrapElement_GivenValue(object o)
     {
-        IEnumerable<object?> array = o.AsEnumerable().ToArray(); // prevent multiple enumeration of IEnumerable
+        IEnumerable<object?> array = o.AsEnumerableValue().ToArray(); // prevent multiple enumeration of IEnumerable
         Assert.IsNotNull(array);
         Assert.IsTrue(array.Count() == 1);
         Assert.AreEqual(o, array.ElementAt(0));
diff --git a/X10D/src/Core/Extensions.cs b/X10D/src/Core/Extensions.cs
index ff51a8a..0dec423 100644
--- a/X10D/src/Core/Extensions.cs
+++ b/X10D/src/Core/Extensions.cs
@@ -1,4 +1,4 @@
-namespace X10D.Core;
+namespace X10D.Core;
 
 /// <summary>
 ///     Extension methods which apply to all types.
@@ -9,11 +9,11 @@ public static class Extensions
     ///     Returns an array containing the specified value.
     /// </summary>
     /// <param name="value">The value to encapsulate.</param>
-    /// <typeparam name="T">The value type.</typeparam>
+    /// <typeparam name="T">The type of <paramref name="value"/>.</typeparam>
     /// <returns>
     ///     An array of type <typeparamref name="T" /> with length 1, whose only element is <paramref name="value" />.
     /// </returns>
-    public static T?[] AsArray<T>(this T? value)
+    public static T?[] AsArrayValue<T>(this T? value)
     {
         return new[] {value};
     }
@@ -22,11 +22,11 @@ public static class Extensions
     ///     Returns an enumerable collection containing the specified value.
     /// </summary>
     /// <param name="value">The value to encapsulate.</param>
-    /// <typeparam name="T">The value type.</typeparam>
+    /// <typeparam name="T">The type of <paramref name="value"/>.</typeparam>
     /// <returns>
     ///     An enumerable collection of type <typeparamref name="T" />, whose only element is <paramref name="value" />.
     /// </returns>
-    public static IEnumerable<T?> AsEnumerable<T>(this T? value)
+    public static IEnumerable<T?> AsEnumerableValue<T>(this T? value)
     {
         yield return value;
     }