diff --git a/Toolkit.Foundation/Cache.cs b/Toolkit.Foundation/Cache.cs
index 5ad43f1..d067ed4 100644
--- a/Toolkit.Foundation/Cache.cs
+++ b/Toolkit.Foundation/Cache.cs
@@ -44,6 +44,17 @@ public class Cache<TValue>(IComparer<TValue>? comparer = default) :
         return false;
     }
 
+    public bool Contains(TValue key)
+    {
+        int index = items.BinarySearch(key, comparer);
+        if (index >= 0)
+        {
+            return true;
+        }
+
+        return false;
+    }
+
     public bool TryGetValue(TValue key, out TValue? item)
     {
         int index = items.BinarySearch(key, comparer);
@@ -147,6 +158,17 @@ public class Cache<TKey, TValue>(IComparer<TKey> comparer) :
         return false;
     }
 
+    public bool Contains(TKey key)
+    {
+        int index = items.FindIndex(kvp => comparer.Compare(kvp.Key, key) == 0);
+        if (index >= 0)
+        {
+            items.RemoveAt(index);
+            return true;
+        }
+        return false;
+    }
+
     private class KeyValuePairComparer<TK, TV>(IComparer<TK> comparer) :
                                 IComparer<KeyValuePair<TK, TV>>
     {
diff --git a/Toolkit.Foundation/Edit.cs b/Toolkit.Foundation/Edit.cs
deleted file mode 100644
index 9edf1f3..0000000
--- a/Toolkit.Foundation/Edit.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-namespace Toolkit.Foundation;
-
-public record Edit
-{
-    public static EditEventArgs<TValue> As<TValue>(TValue value) =>
-        new(value);
-
-    public static EditEventArgs<TValue> As<TValue>() where TValue : new() =>
-        new(new TValue());
-}
\ No newline at end of file
diff --git a/Toolkit.Foundation/EditEventArgs.cs b/Toolkit.Foundation/EditEventArgs.cs
deleted file mode 100644
index 2e3b649..0000000
--- a/Toolkit.Foundation/EditEventArgs.cs
+++ /dev/null
@@ -1,3 +0,0 @@
-namespace Toolkit.Foundation;
-
-public record EditEventArgs<TValue>(TValue Value);
\ No newline at end of file
diff --git a/Toolkit.Foundation/ICache.cs b/Toolkit.Foundation/ICache.cs
index 669a9a1..2220c74 100644
--- a/Toolkit.Foundation/ICache.cs
+++ b/Toolkit.Foundation/ICache.cs
@@ -7,11 +7,13 @@ public interface ICache<TValue> :
 
     void Clear();
 
-    bool TryGetValue(TValue key, out TValue? item);
+    bool Contains(TValue key);
 
     int IndexOf(TValue value);
 
     bool Remove(TValue value);
+
+    bool TryGetValue(TValue key, out TValue? item);
 }
 
 public interface ICache<TKey, TValue> :
@@ -25,6 +27,8 @@ public interface ICache<TKey, TValue> :
 
     void Clear();
 
+    bool Contains(TKey key);
+
     int IndexOf(TKey key);
 
     bool Remove(TKey key);
diff --git a/Toolkit.Foundation/Update.cs b/Toolkit.Foundation/Update.cs
new file mode 100644
index 0000000..5703a48
--- /dev/null
+++ b/Toolkit.Foundation/Update.cs
@@ -0,0 +1,10 @@
+namespace Toolkit.Foundation;
+
+public record Update
+{
+    public static UpdateEventArgs<TValue> As<TValue>(TValue value) =>
+        new(value);
+
+    public static UpdateEventArgs<TValue> As<TValue>() where TValue : new() =>
+        new(new TValue());
+}
\ No newline at end of file
diff --git a/Toolkit.Foundation/UpdateEventArgs.cs b/Toolkit.Foundation/UpdateEventArgs.cs
new file mode 100644
index 0000000..9757d1b
--- /dev/null
+++ b/Toolkit.Foundation/UpdateEventArgs.cs
@@ -0,0 +1,3 @@
+namespace Toolkit.Foundation;
+
+public record UpdateEventArgs<TValue>(TValue Value);
\ No newline at end of file