So I've installed Mono 2.0.1 and MonoDevelop 2.0 Alpha 1 from the binaries provided on www.mono-project.com.

The installation works fine. Mono itself works fine.

MonoDevelop however, although runs totally fine itself, does not see all of the assemblies that are available in the Mono GAC... very odd.

If I do a GACUTIL -L in a Terminal window:

Accessibility, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Accessibility, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Boo.Lang, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.CodeDom, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.Compiler, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.Extensions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.Interpreter, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.Parser, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
Boo.Lang.Useful, Version=2.0.0.0, Culture=neutral, PublicKeyToken=32c39770e9a21a67
ByteFX.Data, Version=0.7.6.1, Culture=neutral, PublicKeyToken=0738eb9f132ed756
ByteFX.Data, Version=0.7.6.2, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Commons.Xml.Relaxng, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Commons.Xml.Relaxng, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
CustomMarshalers, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
CustomMarshalers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
FirebirdSql.Data.Firebird, Version=1.7.1.0, Culture=neutral, PublicKeyToken=0706f5520aae4ff4
I18N, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.CJK, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.CJK, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.MidEast, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.MidEast, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.Other, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.Other, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.Rare, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.Rare, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.West, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
I18N.West, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
IBM.Data.DB2, Version=1.0.0.0, Culture=neutral, PublicKeyToken=7c307b91aa13d208
ICSharpCode.SharpZipLib, Version=0.6.0.0, Culture=neutral, PublicKeyToken=1b03e6acf1164f73
ICSharpCode.SharpZipLib, Version=0.84.0.0, Culture=neutral, PublicKeyToken=1b03e6acf1164f73
ICSharpCode.SharpZipLib, Version=2.6.0.0, Culture=neutral, PublicKeyToken=1b03e6acf1164f73
ICSharpCode.SharpZipLib, Version=2.84.0.0, Culture=neutral, PublicKeyToken=1b03e6acf1164f73
IKVM.AWT.WinForms, Version=0.36.0.11, Culture=neutral, PublicKeyToken=13235d27fcbfff58
IKVM.OpenJDK.ClassLibrary, Version=0.36.0.11, Culture=neutral, PublicKeyToken=13235d27fcbfff58
IKVM.Runtime, Version=0.36.0.11, Culture=neutral, PublicKeyToken=13235d27fcbfff58
Microsoft.Build.Engine, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.Build.Framework, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.Build.Tasks, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.Build.Utilities, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.JScript, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.JScript, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualBasic, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualC, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualC, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.Vsa, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.Vsa, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Mono.Addins, Version=0.3.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Addins.Gui, Version=0.3.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Addins.Setup, Version=0.3.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.C5, Version=1.0.0.0, Culture=neutral, PublicKeyToken=ba07f434b1c35cbd
Mono.Cairo, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Cairo, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Cecil, Version=0.6.8.8607, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Cecil.Mdb, Version=0.2.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.CompilerServices.SymbolWriter, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.CompilerServices.SymbolWriter, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.Sqlite, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.Sqlite, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.SqliteClient, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.SqliteClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.SybaseClient, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.SybaseClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.Tds, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.Tds, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.TdsClient, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Data.TdsClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.GetOptions, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.GetOptions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Http, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Http, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Posix, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Posix, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Security, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Security.Win32, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Security.Win32, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.WebBrowser, Version=0.5.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.WebServer, Version=0.1.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Mono.WebServer2, Version=0.2.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Novell.Directory.Ldap, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Novell.Directory.Ldap, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
Npgsql, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7
Npgsql, Version=2.0.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7
OpenSystem.C, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
OpenSystem.C, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
PEAPI, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
PEAPI, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e
System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Configuration.Install, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Configuration.Install, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e
System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data.OracleClient, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.DirectoryServices, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Drawing, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Drawing.Design, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Drawing.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.EnterpriseServices, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.EnterpriseServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Management, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Management, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Messaging, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Messaging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Net, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e
System.Runtime.Remoting, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Runtime.Remoting, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Runtime.Serialization.Formatters.Soap, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Runtime.Serialization.Formatters.Soap, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Security, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.ServiceProcess, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.ServiceProcess, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Transactions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Web, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Web.Extensions.Design, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
System.Web.Services, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Web.Services, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
System.Windows.Forms, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Xml, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
System.Xml, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e
System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
atk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
cocoa-sharp, Version=1.9.0.0, Culture=neutral, PublicKeyToken=a2b5f5c17ce02f1d
cscompmgd, Version=7.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
cscompmgd, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
gdk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
glade-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
glib-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
gtk-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
monodoc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
nunit.core, Version=2.2.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77
nunit.framework, Version=2.2.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77
nunit.mocks, Version=2.2.8.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77
nunit.util, Version=2.2.0.0, Culture=neutral, PublicKeyToken=96d09a1eb7f44a77
pango-sharp, Version=2.12.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.0.2.Mono.Addins, Version=0.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
policy.0.2.Mono.Addins.Gui, Version=0.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
policy.0.2.Mono.Addins.Setup, Version=0.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756
policy.2.10.atk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.10.gdk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.10.glade-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.10.glib-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.10.gtk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.10.pango-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.atk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.gdk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.glade-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.glib-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.gtk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.4.pango-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.atk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.gdk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.glade-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.glib-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.gtk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.6.pango-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.atk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.gdk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.glade-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.glib-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.gtk-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
policy.2.8.pango-sharp, Version=0.0.0.0, Culture=neutral, PublicKeyToken=35e10195dab3c99f
webkit-sharp, Version=1.9.0.0, Culture=neutral, PublicKeyToken=a2b5f5c17ce02f1d
Number of items = 186

As you can see, I have 186 assemblies listed. In the monoDevelop IDE i can only see a small fraction of these assemblies:

System.*
PEAPI
OpenSystem.C
nunit.*
Npgsql
Novell.*
mscorlib
Mono.*
Microsoft.*
ICSharpCode.SharpZipLib
IBM.*
I18N.*
CustomMarshalers
cscompmgd
Commons.Xml.Relaxng
ByteFX.Data
Accessibility

All of the GTK, WebKit, Pango, Cairo, Glade, Glib, Atk, Mono.Addins, Cocoa, are all missing.

Anyone have this problem? The libraries are there, but not listed in MonoDevelop?!? I am aware that the STETIC GUI designer is not available in this version of MonoDevelop, however, should the projects, and libraries associated with creating GTK based apps supposed to be at least available in the References and paths of the IDE itself? Basically, if you create applications from templates like Glade#, it just says that the Libraries are missing....

We should not have to literally go and add libraries manually, its basically breaking compatibility for all previous MonoDevelop projects that are created before.

I know this is not a OSX86 specific problem, but the Mono community is totally ignoring my requests for assistance, so I thought I would ask in this forum.


Any help would be appreciated guys.

Draek

I ran into this same issue last night when trying to get project that I'd started in VisualStudio working under MonoDevelop with System.DirectoryServices project references. Even after installing libmono-system-ldap1.0-cil, and seeing it listed by gacutil, it still took me a while to figure out what the issue was - and it all makes sense now after I'd come back to it tonight.

MonoDevelop filters the registered packages listed in the Edit Reference window to the .NET version of the project (as opposed to the solution). If you go to the Project's Options / Build / General and check the configured Runtime version, it will need to match the version of the libraries you want to use.

In my case this was a Mono / .NET 2.0 project, which I wanted to keep as .NET 2.0, so I then had to find and install libmono-system-ldap2.0-cil. After restarting MonoDevelop, lo-and-behold it was listed in the Edit Reference window.

Hope this helps!