diff --git a/ICSharpCode.NRefactory.CSharp/ICSharpCode.NRefactory.CSharp.csproj b/ICSharpCode.NRefactory.CSharp/ICSharpCode.NRefactory.CSharp.csproj
index b32a7fc61d..0dc77004fd 100644
--- a/ICSharpCode.NRefactory.CSharp/ICSharpCode.NRefactory.CSharp.csproj
+++ b/ICSharpCode.NRefactory.CSharp/ICSharpCode.NRefactory.CSharp.csproj
@@ -243,7 +243,9 @@
+
+
diff --git a/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertExplicitToImplicitImplementationAction.cs b/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertExplicitToImplicitImplementationAction.cs
new file mode 100644
index 0000000000..0cdc005d04
--- /dev/null
+++ b/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertExplicitToImplicitImplementationAction.cs
@@ -0,0 +1,64 @@
+//
+// ConvertExplicitToImplicitImplementation.cs
+//
+// Author:
+// Mansheng Yang
+//
+// Copyright (c) 2012 Mansheng Yang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using System.Linq;
+using ICSharpCode.NRefactory.Semantics;
+using ICSharpCode.NRefactory.TypeSystem;
+
+namespace ICSharpCode.NRefactory.CSharp.Refactoring
+{
+ [ContextAction ("Convert explicit to implict implementation",
+ Description = " Convert explicit implementation of an interface method to implicit implementation")]
+ public class ConvertExplicitToImplicitImplementationAction : SpecializedCodeAction
+ {
+ protected override CodeAction GetAction (RefactoringContext context, MethodDeclaration node)
+ {
+ if (node.PrivateImplementationType.IsNull)
+ return null;
+
+ if (!node.NameToken.Contains (context.Location) &&
+ !node.PrivateImplementationType.Contains(context.Location))
+ return null;
+
+ var method = (IMethod)((MemberResolveResult)context.Resolve (node)).Member;
+ var type = method.DeclaringType;
+
+ // find existing method with the same signature
+ if (type.GetMethods (m => m.Name == node.Name && m.TypeParameters.Count == method.TypeParameters.Count
+ && !m.IsExplicitInterfaceImplementation)
+ .Any (m => ParameterListComparer.Instance.Equals (m.Parameters, method.Parameters)))
+ return null;
+
+ return new CodeAction (context.TranslateString ("Convert explict to implicit implementation"),
+ script =>
+ {
+ var implicitImpl = (MethodDeclaration)node.Clone ();
+ implicitImpl.PrivateImplementationType = AstType.Null;
+ script.Replace (node, implicitImpl);
+ });
+ }
+ }
+}
diff --git a/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertImplicitToExplicitImplementationAction.cs b/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertImplicitToExplicitImplementationAction.cs
new file mode 100644
index 0000000000..88ab2ec0a4
--- /dev/null
+++ b/ICSharpCode.NRefactory.CSharp/Refactoring/CodeActions/ConvertImplicitToExplicitImplementationAction.cs
@@ -0,0 +1,60 @@
+//
+// ConvertImplicitToExplicitImplementationAction.cs
+//
+// Author:
+// Mansheng Yang
+//
+// Copyright (c) 2012 Mansheng Yang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using ICSharpCode.NRefactory.Semantics;
+using ICSharpCode.NRefactory.TypeSystem;
+
+namespace ICSharpCode.NRefactory.CSharp.Refactoring
+{
+ [ContextAction ("Convert implict to explicit implementation",
+ Description = " Convert implict implementation of an interface method to explicit implementation")]
+ public class ConvertImplicitToExplicitImplementationAction : SpecializedCodeAction
+ {
+ protected override CodeAction GetAction (RefactoringContext context, MethodDeclaration node)
+ {
+ if (!node.PrivateImplementationType.IsNull)
+ return null;
+
+ if (!node.NameToken.Contains (context.Location))
+ return null;
+
+ var method = (IMethod)((MemberResolveResult)context.Resolve (node)).Member;
+ if (method.ImplementedInterfaceMembers.Count != 1 || method.DeclaringType.Kind == TypeKind.Interface)
+ return null;
+
+ return new CodeAction (context.TranslateString ("Convert implict to explicit implementation"),
+ script =>
+ {
+ var explicitImpl = (MethodDeclaration)node.Clone ();
+ // remove visibility modifier
+ explicitImpl.Modifiers &= ~Modifiers.VisibilityMask;
+ var implementedInterface = method.ImplementedInterfaceMembers [0].DeclaringType;
+ explicitImpl.PrivateImplementationType = context.CreateShortType (implementedInterface);
+ script.Replace (node, explicitImpl);
+ });
+ }
+ }
+}
diff --git a/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertExplicitToImplicitImplementationTests.cs b/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertExplicitToImplicitImplementationTests.cs
new file mode 100644
index 0000000000..5486559e59
--- /dev/null
+++ b/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertExplicitToImplicitImplementationTests.cs
@@ -0,0 +1,92 @@
+//
+// ConvertExplicitToImplicitImplementationTests.cs
+//
+// Author:
+// Mansheng Yang
+//
+// Copyright (c) 2012 Mansheng Yang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using ICSharpCode.NRefactory.CSharp.Refactoring;
+using NUnit.Framework;
+
+namespace ICSharpCode.NRefactory.CSharp.CodeActions
+{
+ [TestFixture]
+ public class ConvertExplicitToImplicitImplementationTests : ContextActionTestBase
+ {
+ [Test]
+ public void Test ()
+ {
+ Test (@"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void $ITest.Method ()
+ {
+ }
+}", @"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void Method ()
+ {
+ }
+}");
+ }
+
+ [Test]
+ public void TestExistingMethod ()
+ {
+ TestWrongContext (@"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void $ITest.Method ()
+ {
+ }
+ void Method ()
+ {
+ }
+}");
+ }
+
+ [Test]
+ public void TestNonExplitiImplementation ()
+ {
+ TestWrongContext (@"
+class TestClass
+{
+ void $Method ()
+ {
+ }
+}");
+ }
+ }
+}
diff --git a/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertImplicitToExplicittImplementationTests.cs b/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertImplicitToExplicittImplementationTests.cs
new file mode 100644
index 0000000000..130bee6bd0
--- /dev/null
+++ b/ICSharpCode.NRefactory.Tests/CSharp/CodeActions/ConvertImplicitToExplicittImplementationTests.cs
@@ -0,0 +1,133 @@
+//
+// ConvertImplicitToExplicittImplementationTests.cs
+//
+// Author:
+// Mansheng Yang
+//
+// Copyright (c) 2012 Mansheng Yang
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+using ICSharpCode.NRefactory.CSharp.Refactoring;
+using NUnit.Framework;
+
+namespace ICSharpCode.NRefactory.CSharp.CodeActions
+{
+ [TestFixture]
+ public class ConvertImplicitToExplicittImplementationTests : ContextActionTestBase
+ {
+ [Test]
+ public void Test ()
+ {
+ Test (@"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void $Method ()
+ {
+ }
+}", @"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void ITest.Method ()
+ {
+ }
+}");
+ }
+
+ [Test]
+ public void TestMultipleInterfaces ()
+ {
+ TestWrongContext (@"
+interface ITest
+{
+ void Method ();
+}
+interface ITest2
+{
+ void Method ();
+}
+class TestClass : ITest, ITest2
+{
+ void $Method ()
+ {
+ }
+}");
+ }
+
+ [Test]
+ public void TestNonImplicitImplementation ()
+ {
+ TestWrongContext (@"
+class TestClass
+{
+ void $Method ()
+ {
+ }
+}");
+ }
+
+ [Test]
+ public void TestInterfaceMethod ()
+ {
+ TestWrongContext (@"
+interface ITest
+{
+ void Method ();
+}
+interface ITest2 : ITest
+{
+ void $Method ();
+}");
+ }
+
+ [Test]
+ public void TestModifier ()
+ {
+ Test (@"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ public void $Method ()
+ {
+ }
+}", @"
+interface ITest
+{
+ void Method ();
+}
+class TestClass : ITest
+{
+ void ITest.Method ()
+ {
+ }
+}");
+ }
+ }
+}
diff --git a/ICSharpCode.NRefactory.Tests/ICSharpCode.NRefactory.Tests.csproj b/ICSharpCode.NRefactory.Tests/ICSharpCode.NRefactory.Tests.csproj
index 70d8c4b79a..af7e5dcb0c 100644
--- a/ICSharpCode.NRefactory.Tests/ICSharpCode.NRefactory.Tests.csproj
+++ b/ICSharpCode.NRefactory.Tests/ICSharpCode.NRefactory.Tests.csproj
@@ -83,7 +83,9 @@
+
+