added new exercices

Algorithms/IdCard/IDCard.cs

@@ -0,0 +1,25 @@
+using Algorithms.IdCard;
+
+public class IDCard
+{
+    private Name name;
+    private PostalCode postalCode;
+    private TelephonNumber telephonNumber;
+
+    public IDCard(Name name,
+                  PostalCode postalCode,
+                  TelephonNumber telephonNumber)
+    {
+
+        this.name = name;
+        this.postalCode = postalCode;
+        this.telephonNumber = telephonNumber;
+    }
+
+    public bool IsValid()
+    {
+        return name.IsValid()
+        && telephonNumber.IsValid()
+        && postalCode.IsValid();
+    }
+}