diff --git a/Roadmap/26 - SOLID SRP/c#/kenysdev.cs b/Roadmap/26 - SOLID SRP/c#/kenysdev.cs
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+#pragma warning disable CA1050 //namespace
+/*
+╔══════════════════════════════════════╗
+║ Autor:  Kenys Alvarado               ║
+║ GitHub: https://github.com/Kenysdev  ║
+║ 2024 -  C#                           ║
+╚══════════════════════════════════════╝
+-------------------------------------------------
+* SOLID: PRINCIPIO DE RESPONSABILIDAD ÚNICA (SRP)
+-------------------------------------------------
+# Se centra en la claridad, la cohesión y la separación de intereses.
+# Cada clase debe tener una única razón para cambiar.
+# Los metodos de una clase deben estar estrechamente relacionadas.
+
+__________________________________
+* EJERCICIO:
+* Explora el "Principio SOLID de Responsabilidad Única (Single Responsibility
+* Principle, SRP)" y crea un ejemplo simple donde se muestre su funcionamiento
+* de forma correcta e incorrecta.
+*/
+
+// # SIN APLICAR EL PRINCIPIO:
+using System.Collections.Generic;
+
+public class NoSRP {
+    private readonly List<string> customers;
+    private readonly List<string> suppliers;
+
+    public NoSRP() {
+        customers = [];
+        suppliers = [];
+    }
+
+    public void AddCustomer(string name) {
+        customers.Add(name);
+    }
+
+    public void AddSupplier(string name) {
+        suppliers.Add(name);
+    }
+
+    public void RemoveCustomer(string name) {
+        customers.Remove(name);
+    }
+
+    public void RemoveSupplier(string name) {
+        suppliers.Remove(name);
+    }
+}
+
+// _______________________________________
+// APLICANDO EL PRINCIPIO:
+
+public class Customers {
+    private readonly List<string> customers;
+
+    public Customers() {
+        customers = [];
+    }
+
+    public void Add(string name) {
+        customers.Add(name);
+    }
+
+    public void Remove(string name) {
+        customers.Remove(name);
+    }
+}
+
+public class Suppliers {
+    private readonly List<string> suppliers;
+
+    public Suppliers() {
+        suppliers = [];
+    }
+
+    public void Add(string name) {
+        suppliers.Add(name);
+    }
+
+    public void Remove(string name) {
+        suppliers.Remove(name);
+    }
+}