diff --git a/LibMatrix/Extensions/DictionaryExtensions.cs b/LibMatrix/Extensions/DictionaryExtensions.cs
new file mode 100644
index 0000000..fbc5cf5
--- /dev/null
+++ b/LibMatrix/Extensions/DictionaryExtensions.cs
@@ -0,0 +1,33 @@
+namespace LibMatrix.Extensions;
+
+public static class DictionaryExtensions {
+ public static bool ChangeKey<TKey, TValue>(this IDictionary<TKey, TValue> dict,
+ TKey oldKey, TKey newKey) {
+ TValue value;
+ if (!dict.Remove(oldKey, out value))
+ return false;
+
+ dict[newKey] = value; // or dict.Add(newKey, value) depending on ur comfort
+ return true;
+ }
+
+ public static Y GetOrCreate<X, Y>(this IDictionary<X, Y> dict, X key) where Y : new() {
+ if (dict.TryGetValue(key, out var value)) {
+ return value;
+ }
+
+ value = new Y();
+ dict.Add(key, value);
+ return value;
+ }
+
+ public static Y GetOrCreate<X, Y>(this IDictionary<X, Y> dict, X key, Func<X, Y> valueFactory) {
+ if (dict.TryGetValue(key, out var value)) {
+ return value;
+ }
+
+ value = valueFactory(key);
+ dict.Add(key, value);
+ return value;
+ }
+}
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