create project and customercontroller

AB.Domain/Exceptions/BusinessPartnerNotFoundException.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AB.Domain.Exceptions
+{
+    public class BusinessPartnerNotFoundException : NotFoundException
+    {
+
+        public BusinessPartnerNotFoundException(Guid businessPartnerId)
+        : base ($"The BusinessPartner with the indetifier {businessPartnerId} was not found.")
+            { }
+
+    }
+}

AB.Domain/Exceptions/NotFoundException.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AB.Domain.Exceptions
+{
+
+	[Serializable]
+	public abstract class NotFoundException : Exception
+	{
+		public NotFoundException() { }
+		public NotFoundException(string message) : base(message) { }
+		public NotFoundException(string message, Exception inner) : base(message, inner) { }
+		protected NotFoundException(
+		  System.Runtime.Serialization.SerializationInfo info,
+		  System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
+	}
+}