Works in VS 2013

Backup/Whut.AttachTo.sln

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+
+Microsoft Visual Studio Solution File, Format Version 11.00
+# Visual Studio 2010
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Whut.AttachTo", "Whut.AttachTo\Whut.AttachTo.csproj", "{557B4FF9-0BBA-4631-9101-FA5DF4D519A3}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{557B4FF9-0BBA-4631-9101-FA5DF4D519A3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{557B4FF9-0BBA-4631-9101-FA5DF4D519A3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{557B4FF9-0BBA-4631-9101-FA5DF4D519A3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{557B4FF9-0BBA-4631-9101-FA5DF4D519A3}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

Backup/Whut.AttachTo/AttachToPackage.cs

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+using System;
+using System.ComponentModel.Design;
+using System.Linq;
+using System.Runtime.InteropServices;
+using EnvDTE;
+using Microsoft.VisualStudio;
+using Microsoft.VisualStudio.Shell;
+
+namespace Whut.AttachTo
+{
+    //// This attribute tells the PkgDef creation utility (CreatePkgDef.exe) that this class is a package.
+    [PackageRegistration(UseManagedResourcesOnly = true)]
+    //// This attribute is used to register the informations needed to show the this package in the Help/About dialog of Visual Studio.
+    [InstalledProductRegistration("#110", "#112", "1.0", IconResourceID = 400)]
+    //// This attribute is needed to let the shell know that this package exposes some menus.
+    [ProvideMenuResource("Menus.ctmenu", 1)]
+    [Guid(GuidList.guidAttachToPkgString)]
+    [ProvideOptionPage(typeof(GeneralOptionsPage), "Whut.AttachTo", "General", 110, 120, false)]
+    [ProvideAutoLoad(VSConstants.UICONTEXT.SolutionExists_string)]
+    [ProvideAutoLoad(VSConstants.UICONTEXT.NoSolution_string)]
+    public sealed class AttachToPackage : Package
+    {
+        protected override void Initialize()
+        {
+            base.Initialize();
+
+            OleMenuCommandService mcs = GetService(typeof(IMenuCommandService)) as OleMenuCommandService;
+
+            this.AddAttachToCommand(mcs, PkgCmdIDList.cmdidWhutAttachToIIS, gop => gop.ShowAttachToIIS, "w3wp.exe");
+            this.AddAttachToCommand(mcs, PkgCmdIDList.cmdidWhutAttachToIISExpress, gop => gop.ShowAttachToIISExpress, "iisexpress.exe");
+            this.AddAttachToCommand(mcs, PkgCmdIDList.cmdidWhutAttachToNUnit, gop => gop.ShowAttachToNUnit, "nunit-agent.exe", "nunit.exe", "nunit-console.exe", "nunit-agent-x86.exe", "nunit-x86.exe", "nunit-console-x86.exe");
+        }
+
+        private void AddAttachToCommand(OleMenuCommandService mcs, uint commandId, Func<GeneralOptionsPage, bool> isVisible, params string[] programsToAttach)
+        {
+            OleMenuCommand menuItemCommand = new OleMenuCommand(
+                delegate(object sender, EventArgs e)
+                {
+                    DTE dte = (DTE)this.GetService(typeof(DTE));
+                    foreach (Process process in dte.Debugger.LocalProcesses)
+                    {
+                        if (programsToAttach.Any(p => process.Name.EndsWith(p)))
+                        {
+                            process.Attach();
+                        }
+                    }
+                },
+                new CommandID(GuidList.guidAttachToCmdSet, (int)commandId));
+            menuItemCommand.BeforeQueryStatus += (s, e) => menuItemCommand.Visible = isVisible((GeneralOptionsPage)this.GetDialogPage(typeof(GeneralOptionsPage)));
+            mcs.AddCommand(menuItemCommand);
+        }
+    }
+}

Backup/Whut.AttachTo/GeneralOptionsPage.cs

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+using System.ComponentModel;
+using Microsoft.VisualStudio.Shell;
+
+namespace Whut.AttachTo
+{
+    public class GeneralOptionsPage : DialogPage
+    {
+        public GeneralOptionsPage()
+        {
+            this.ShowAttachToIIS = true;
+            this.ShowAttachToIISExpress = true;
+            this.ShowAttachToNUnit = true;
+        }
+
+        [Category("General")]
+        [DisplayName("Show 'Attach to IIS' command")]
+        [Description("Show 'Attach to IIS' command in Tools menu.")]
+        [DefaultValue(true)]
+        public bool ShowAttachToIIS { get; set; }
+
+        [Category("General")]
+        [DisplayName("Show 'Attach to IIS Express command")]
+        [Description("Show 'Attach to IIS Express command in Tools menu.")]
+        [DefaultValue(true)]
+        public bool ShowAttachToIISExpress { get; set; }
+
+        [Category("General")]
+        [DisplayName("Show 'Attach to NUnit' command")]
+        [Description("Show 'Attach to NUnit' command in Tools menu.")]
+        [DefaultValue(true)]
+        public bool ShowAttachToNUnit { get; set; }
+    }
+}

Backup/Whut.AttachTo/Guids.cs

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+// Guids.cs
+// MUST match guids.h
+using System;
+
+namespace Whut.AttachTo
+{
+    public static class GuidList
+    {
+        public const string guidAttachToPkgString = "8d6080f0-7276-44d7-8dc4-6378fb6ce225";
+
+        public const string guidAttachToCmdSetString = "16e2ac5c-ec3d-4ff1-a237-11ccef54fe0f";
+
+        public static readonly Guid guidAttachToCmdSet = new Guid(guidAttachToCmdSetString);
+    }
+}

Backup/Whut.AttachTo/PkgCmdID.cs

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+// PkgCmdID.cs
+// MUST match PkgCmdID.h
+
+namespace Whut.AttachTo
+{
+    public static class PkgCmdIDList
+    {
+        public const uint cmdidWhutAttachToIIS = 0x100;
+
+        public const uint cmdidWhutAttachToIISExpress = 0x101;
+
+        public const uint cmdidWhutAttachToNUnit = 0x102;
+    }
+}

Backup/Whut.AttachTo/Properties/AssemblyInfo.cs

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+using System;
+using System.Reflection;
+using System.Resources;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("AttachTo")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("Whut")]
+[assembly: AssemblyProduct("AttachTo")]
+[assembly: AssemblyCopyright("")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+[assembly: CLSCompliant(false)]
+[assembly: NeutralResourcesLanguage("en-US")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Revision and Build Numbers 
+// by using the '*' as shown below:
+[assembly: AssemblyVersion("1.0.1.0")]
+[assembly: AssemblyFileVersion("1.0.1.0")]

Backup/Whut.AttachTo/Resources.resx

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    VS SDK Notes: This resx file contains the resources that will be consumed directly by your package.
+    For example, if you chose to create a tool window, there is a resource with ID 'CanNotCreateWindow'. This
+    is used in VsPkg.cs to determine the string to show the user if there is an error when attempting to create
+    the tool window.
+
+    Resources that are accessed directly from your package *by Visual Studio* are stored in the VSPackage.resx 
+    file.
+-->
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>