feat: Add IsEmpty property on ImmutableMetadata class

src/OpenFeature/Model/ImmutableMetadata.cs

@@ -11,6 +11,14 @@ public sealed class ImmutableMetadata
 {
     private readonly ImmutableDictionary<string, object> _metadata;
 
+    /// <summary>
+    /// Gets a value indicating whether this instance is empty.
+    /// </summary>
+    /// <value>
+    ///   <c>true</c> if this instance is empty; otherwise, <c>false</c>.
+    /// </value>
+    public bool IsEmpty => this._metadata.Count == 0;
+
     /// <summary>
     /// Constructor for the <see cref="ImmutableMetadata"/> class.
     /// </summary>

test/OpenFeature.Tests/ImmutableMetadataTest.cs

@@ -315,4 +315,48 @@ public void Count_ShouldReturnCountOfMetadata()
         // Assert
         Assert.Equal(metadata.Count, result);
     }
+
+    [Fact]
+    public void IsEmpty_ShouldReturnTrue()
+    {
+        // Arrange
+        var flagMetadata = new ImmutableMetadata();
+
+        // Act
+        var result = flagMetadata.IsEmpty;
+
+        // Assert
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void IsEmpty_ShouldReturnFalse()
+    {
+        // Arrange
+        var metadata = new Dictionary<string, object>
+           {
+            {
+                "wrongKey", new object()
+            },
+            {
+                "stringKey", "11"
+            },
+            {
+                "doubleKey", 1.2
+            },
+            {
+                "intKey", 1
+            },
+            {
+                "boolKey", true
+            }
+        };
+        var flagMetadata = new ImmutableMetadata(metadata);
+
+        // Act
+        var result = flagMetadata.IsEmpty;
+
+        // Assert
+        Assert.False(result);
+    }
 }