diff --git a/examples/Usage.ts b/examples/Usage.ts
new file mode 100644
index 0000000..8e8e181
--- /dev/null
+++ b/examples/Usage.ts
@@ -0,0 +1,22 @@
+import { BaseResolver, PortResolver } from "@nx/typescript-domain"
+
+interface IColor {
+    red: number;
+    green: number;
+    blue: number;
+}
+
+class Domain extends BaseResolver {
+    get Color(): IColor { return this.resolve("IColor") };
+}
+
+const resolver = new PortResolver();
+resolver.registerInstance("IColor", () => ({red: 1.0, green: 0, blue: 0}))
+// resolver.register("IColor", () => ({red: 1.0, green: 0, blue: 0}))
+const domain = new Domain();
+domain.setResolver(resolver);
+
+console.log("color", domain.Color);
+domain.Color.green = 0.5; // registerInstance: allow changes, register returns new object
+console.log("color", domain.Color);
+