Added YamlIgnore attribute that makes the serializer skip properties

YamlDotNet.RepresentationModel/Serialization/FullObjectGraphTraversalStrategy.cs

@@ -202,7 +202,10 @@ namespace YamlDotNet.RepresentationModel.Serialization
 
 		protected virtual bool IsTraversableProperty(PropertyInfo property)
 		{
-			return property.CanRead && property.GetGetMethod().GetParameters().Length == 0;
+      return
+        property.CanRead &&
+        property.GetGetMethod().GetParameters().Length == 0 &&
+        property.GetCustomAttributes(typeof(YamlIgnoreAttribute), true).Length == 0;
 		}
 
 		private static Type GetObjectType(object value)

YamlDotNet.RepresentationModel/Serialization/YamlIgnoreAttribute.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace YamlDotNet.RepresentationModel.Serialization
+{
+  /// <summary>
+  /// Instructs the YamlSerializer not to serialize the public field or public read/write property value.
+  /// </summary>
+  [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false)]
+  public sealed class YamlIgnoreAttribute : Attribute
+  {
+  }
+}
+

YamlDotNet.RepresentationModel/YamlDotNet.RepresentationModel.csproj

@@ -104,6 +104,7 @@
     <Compile Include="Serialization\ObjectConverter.cs" />
     <Compile Include="Serialization\TagMappings.cs" />
     <Compile Include="Serialization\TypeAssigningEventEmitter.cs" />
+    <Compile Include="Serialization\YamlIgnoreAttribute.cs" />
     <Compile Include="YamlAliasNode.cs" />
     <Compile Include="YamlDocument.cs" />
     <Compile Include="YamlMappingNode.cs" />
@@ -157,4 +158,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>

YamlDotNet.UnitTests/RepresentationModel/SerializationTests.cs

@@ -135,7 +135,6 @@ namespace YamlDotNet.UnitTests.RepresentationModel
 					myPoint = value;
 				}
 			}
-
 		}
 
 		[Fact]
@@ -652,5 +651,26 @@ namespace YamlDotNet.UnitTests.RepresentationModel
 		//{
 		//	var serializer = new YamlSerializer(typeof(X));
 		//}
+
+		class ContainsIgnore {
+			[YamlIgnore]
+			public String IgnoreMe { get; set; }
+		}
+
+		[Fact]
+		public void SerializationRespectsYamlIgnoreAttribute()
+		{
+			var serializer = new Serializer();
+			var deserializer = new YamlSerializer<ContainsIgnore>(YamlSerializerModes.EmitDefaults | YamlSerializerModes.JsonCompatible | YamlSerializerModes.Roundtrip);
+      
+			using (StringWriter buffer = new StringWriter())
+			{
+				var orig = new ContainsIgnore { IgnoreMe = "Some Text" };
+				serializer.Serialize(buffer, orig);
+				Console.WriteLine(buffer.ToString());
+				var copy = deserializer.Deserialize(new StringReader(buffer.ToString()));
+				Assert.Null(copy.IgnoreMe);
+			}
+		}
 	}
 }