checkpoint

.gitignore

@@ -1,2 +1,2 @@
-/bin/
-/obj/
+bin/
+obj/

.idea/.idea.DotNetAlpm/.idea/.gitignore

@@ -2,10 +2,10 @@
 /shelf/
 /workspace.xml
 # Rider ignored files
-/contentModel.xml
-/.idea.DotNetAplm.iml
-/projectSettingsUpdater.xml
 /modules.xml
+/contentModel.xml
+/projectSettingsUpdater.xml
+/.idea.DotNetAlpm.iml
 # Datasource local storage ignored files
 /dataSources/
 /dataSources.local.xml

.idea/.idea.DotNetAplm.dir/.idea/.idea.DotNetAplm.dir.iml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="RIDER_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

.idea/.idea.nalpm.dir/.idea/.gitignore

@@ -1,13 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml
-# Rider ignored files
-/modules.xml
-/contentModel.xml
-/projectSettingsUpdater.xml
-/.idea.nalpm.iml
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
-# Editor-based HTTP Client requests
-/httpRequests/

.idea/.idea.nalpm.dir/.idea/.idea.nalpm.dir.iml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="RIDER_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

.idea/.idea.nalpm.dir/.idea/encodings.xml

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
-</project>

.idea/.idea.nalpm.dir/.idea/indexLayout.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ContentModelUserStore">
-    <attachedFolders />
-    <explicitIncludes />
-    <explicitExcludes />
-  </component>
-</project>

.idea/.idea.nalpm.dir/.idea/misc.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="JavaScriptSettings">
-    <option name="languageLevel" value="ES6" />
-  </component>
-</project>

.idea/.idea.nalpm.dir/.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
-  </component>
-</project>

.idea/.idea.nalpm.dir/riderModule.iml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="RIDER_MODULE" version="4">
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$/../.." />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>

API.cs

@@ -1,18 +0,0 @@
-using System;
-
-namespace Foodsoft.Alpm
-{
-    public static class API
-    {
-        public static readonly string Version = alpm.alpm_version();
-
-        internal static void WrapError(SafeAlpmHandle h, Func<int> f)
-        {
-            var err = f();
-            if (err != 0)
-            {
-                throw new Exception(alpm.alpm_errno(h));
-            }
-        }
-    }
-}

Alpm/API.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace Foodsoft.Alpm
+{
+    public static class API
+    {
+        public static readonly string Version = alpm.alpm_version();
+
+        internal static void WrapError(SafeAlpmHandle h, Func<int> f)
+        {
+            var err = f();
+            if (err != 0)
+            {
+                throw new Exception(alpm.alpm_errno(h));
+            }
+        }
+        
+        /*
+         * Handles the pattern where <0 is exceptional, but 1 is some "false"
+         * condition.
+         */
+        internal static bool WrapErrorBool(SafeAlpmHandle h, Func<int> f)
+        {
+            var err = f();
+            if (err < 0)
+            {
+                throw new Exception(alpm.alpm_errno(h));
+            }
+            return err == 0;
+        }
+
+    }
+}

Alpm/Alpm.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <OutputType>Exe</OutputType>
+    <OutputType>Module</OutputType>
     <TargetFramework>netcoreapp3.1</TargetFramework>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <Nullable>enable</Nullable>

Alpm/CollectionWrapper`2.cs

@@ -3,6 +3,8 @@ using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 
+// FIXME: This is increasing the ref-count on AlpmHandle all the time, so this is NOT correct for database handles,
+// or other handles that have a dispose that is not a no-op.
 namespace Foodsoft.Alpm
 {
     internal class CollectionWrapper<TImpl, TElement> : ICollection<TElement> where TImpl : struct,

Alpm/Database.cs

@@ -10,27 +10,38 @@ namespace Foodsoft.Alpm
 
         internal Database(SafeDatabaseHandle handle) => _handle = handle;
 
-        private readonly struct ServersAccessor : IItemsAccessor<string>
+        public void Unregister()
         {
-            private readonly SafeDatabaseHandle _handle;
-
-            internal ServersAccessor(SafeDatabaseHandle handle)
+            try
             {
-                _handle = handle;
+                API.WrapError(_handle.SafeAlpmHandle, () => alpm.alpm_db_unregister(_handle));
+            }
+            finally
+            {
+                _handle.Close();
+            }
         }
 
-            public SafeAlpmHandle SafeAlpmHandle => _handle.SafeAlpmHandle;
-            public IntPtr GetItems() => alpm.alpm_db_get_servers(_handle);
-            public int SetItems(IntPtr list) => alpm.alpm_db_set_servers(_handle, list);
-            public int AddItem(string item) => alpm.alpm_db_add_server(_handle, item);
-            public int RemoveItem(string item) => alpm.alpm_db_remove_server(_handle, item);
-            public IntPtr FindItem(string item) => alpm.alpm_list_find_str(GetItems(), item);
+
+        private readonly struct ServersAccessor : IItemsReader<string, SafeDatabaseHandle>
+        {
+            internal ServersAccessor(SafeDatabaseHandle handle)
+            {
+                Handle = handle;
+            }
+
+            public SafeDatabaseHandle Handle { get; }
+            public IntPtr GetItems() => alpm.alpm_db_get_servers(Handle);
             public string PtrToItem(IntPtr p) => Marshal.PtrToStringUTF8(p)!;
         }
 
-        public ICollection<string> Servers
+        public void AddServer(string url) => API.WrapError(_handle.SafeAlpmHandle, () => alpm.alpm_db_add_server(_handle, url));
+
+        public bool RemoveServer(string url) => API.WrapErrorBool(_handle.SafeAlpmHandle, () => alpm.alpm_db_remove_server(_handle, url));
+
+        public IEnumerable<string> Servers
         {
-            get => new CollectionWrapper<ServersAccessor, string>(new ServersAccessor(_handle));
+            get => new EnumerableWrapper<ServersAccessor, string, SafeDatabaseHandle>(new ServersAccessor(_handle));
             set
             {
                 foreach (var s in value)
@@ -40,7 +51,6 @@ namespace Foodsoft.Alpm
             }
         }
 
-
         public string Name => alpm.alpm_db_get_name(_handle);
 
         public SigLevel SigLevel => alpm.alpm_db_get_siglevel(_handle);
@@ -48,7 +58,7 @@ namespace Foodsoft.Alpm
         public ErrNo Valid =>
             alpm.alpm_db_get_valid(_handle) != 0 ? alpm.alpm_errno(_handle.SafeAlpmHandle) : ErrNo.ERR_OK;
 
-        public bool Update(bool force)
+        public bool Update(bool force = false)
         {
             var err = alpm.alpm_db_update(force ? 1 : 0, _handle);
             if (err < 0)
@@ -69,21 +79,18 @@ namespace Foodsoft.Alpm
                     return null;
                 throw new Exception(err);
             }
+
             return new CachePackage(new SafeCachePackageHandle(pkgPtr, _handle), this);
         }
 
-        private readonly struct PkgCacheAccessor : IReadOnlyItemsAccessor<Package>
+        public PackageList PackageCache
         {
-            private readonly SafeDatabaseHandle _handle;
-            public SafeAlpmHandle SafeAlpmHandle => _handle.SafeAlpmHandle;
-            public IntPtr GetItems()
+            get
             {
-                throw new NotImplementedException();
-            }
-
-            public Package PtrToItem(IntPtr p)
-            {
-                throw new NotImplementedException();
+                var listPtr = alpm.alpm_db_get_pkgcache(_handle);
+                if (listPtr == IntPtr.Zero)
+                    throw new Exception(alpm.alpm_errno(_handle.SafeAlpmHandle));
+                return new PackageList(new SafeListHandle<SafeDatabaseHandle>(listPtr, _handle), this);
             }
         }
 

Alpm/EnumerableWrapper`3.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal struct EnumerableWrapper<TImpl, TElement, THandle> : IEnumerable<TElement> where TImpl : struct,
+        IItemsReader<TElement, THandle>
+        where THandle : SafeHandle
+    {
+        private TImpl _impl;
+
+        public EnumerableWrapper(TImpl impl)
+        {
+            _impl = impl;
+        }
+
+        public IEnumerator<TElement> GetEnumerator()
+        {
+            var handle = _impl.Handle;
+            var release = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                handle.DangerousAddRef(ref release);
+                if (!release) throw new ObjectDisposedException(_impl.GetType().FullName);
+                for (var list = _impl.GetItems(); list != IntPtr.Zero; list = Wrapper.ListNext(list))
+                {
+                    yield return _impl.PtrToItem(Wrapper.ListData(list));
+                }
+            }
+            finally
+            {
+                if (release)
+                    handle.DangerousRelease();
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}

Alpm/IItemsReader`2.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal interface IItemsReader<out TElement, out THandle> where THandle : SafeHandle
+    {
+        public THandle Handle { get; }
+        public IntPtr GetItems();
+        public TElement PtrToItem(IntPtr p);
+    }
+}

Alpm/IPackageData.cs

@@ -26,7 +26,7 @@ namespace Foodsoft.Alpm
         Signature = (1 << 3)
     }
 
-    public interface IPackageData
+    public interface IPackageData : IDisposable
     {
         public string Filename { get; }
         public string Base { get; }
@@ -44,7 +44,7 @@ namespace Foodsoft.Alpm
         public long Size { get; }
         public long InstalledSize { get; }
         public InstallReason InstallReason { get; }
-        public IReadOnlyCollection<string> Licenses { get; }
+        public IEnumerable<string> Licenses { get; }
         public IReadOnlyCollection<string> Groups { get; }
         public IReadOnlyCollection<Depend> Depends { get; }
         public IReadOnlyCollection<Depend> OptDepends { get; }

Alpm/Package.cs

@@ -1,9 +1,10 @@
 using System;
 using System.Collections.Generic;
+using System.Runtime.InteropServices;
 
 namespace Foodsoft.Alpm
 {
-    public class Package : IPackageData
+    public abstract class Package : IPackageData
     {
         internal SafePackageHandle Handle { get; }
 
@@ -30,7 +31,7 @@ namespace Foodsoft.Alpm
         public long InstalledSize => alpm.alpm_pkg_get_isize(Handle);
         public InstallReason InstallReason => alpm.alpm_pkg_get_reason(Handle);
 
-        public IReadOnlyCollection<string> Licenses { get; }
+        public IEnumerable<string> Licenses { get; }
         public IReadOnlyCollection<string> Groups { get; }
         public IReadOnlyCollection<Depend> Depends { get; }
         public IReadOnlyCollection<Depend> OptDepends { get; }
@@ -63,6 +64,10 @@ namespace Foodsoft.Alpm
         }
 
 
+        public void Dispose()
+        {
+            Handle.Dispose();
+        }
     }
     
 }

Alpm/PackageList.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+
+namespace Foodsoft.Alpm
+{
+    public struct PackageList : IEnumerable<Package>, IDisposable
+    {
+        private SafeListHandle<SafeDatabaseHandle> _handle;
+        private Database _db;
+
+        internal PackageList(SafeListHandle<SafeDatabaseHandle> handle, Database db)
+        {
+            _handle = handle;
+            _db = db;
+        }
+
+        public IEnumerator<Package> GetEnumerator()
+        {
+            var release = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                _handle.DangerousAddRef(ref release);
+                if (!release) throw new ObjectDisposedException(_handle.GetType().FullName);
+                for (var list = _handle.DangerousGetHandle(); list != IntPtr.Zero; list = Wrapper.ListNext(list))
+                {
+                    yield return new CachePackage(
+                        new SafeCachePackageHandle(Wrapper.ListData(list), _handle.ParentHandle), _db);
+                }
+            }
+            finally
+            {
+                if (release)
+                    _handle.DangerousRelease();
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public void Dispose()
+        {
+            _handle.Dispose();
+        }
+    }
+}

Alpm/SafeCachePackageHandle.cs

@@ -6,21 +6,16 @@ namespace Foodsoft.Alpm
 {
     internal sealed class SafeCachePackageHandle : SafePackageHandle
     {
-        internal SafeDatabaseHandle SafeDatabaseHandle
-        {
-            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
-            [PrePrepareMethod]
-            get;
-        } = null!;
-
         internal SafeAlpmHandle SafeAlpmHandle => SafeDatabaseHandle.SafeAlpmHandle;
+        internal SafeDatabaseHandle SafeDatabaseHandle { get; } = null!;
 
         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
         [PrePrepareMethod]
-        internal SafeCachePackageHandle(IntPtr pkgPtr, SafeDatabaseHandle dbHandle)
+        internal SafeCachePackageHandle(IntPtr ptr, SafeDatabaseHandle dbHandle)
             : base()
         {
             var success = false;
+
             RuntimeHelpers.PrepareConstrainedRegions();
             try { }
             finally
@@ -28,15 +23,14 @@ namespace Foodsoft.Alpm
                 dbHandle.DangerousAddRef(ref success);
                 if (success)
                 {
-                    handle = pkgPtr;
                     SafeDatabaseHandle = dbHandle;
+                    handle = ptr;
                 }
             }
 
             if (!success) throw new ObjectDisposedException(GetType().FullName);
         }
 
-        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
         protected override bool ReleaseHandle()
         {
             SafeDatabaseHandle.DangerousRelease();

Alpm/SafeDatabaseHandle.cs

@@ -39,9 +39,8 @@ namespace Foodsoft.Alpm
         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail), PrePrepareMethod]
         protected override bool ReleaseHandle()
         {
-            var ret = alpm.alpm_db_unregister(handle) == 0;
             SafeAlpmHandle.DangerousRelease();
-            return ret;
+            return true;
         }
 
         public override bool IsInvalid

Alpm/SafeListHandle`1.cs

@@ -5,9 +5,9 @@ using System.Runtime.InteropServices;
 
 namespace Foodsoft.Alpm
 {
-    internal sealed class SafeListHandle : SafeHandle
+    internal sealed class SafeListHandle<TParent> : SafeHandle where TParent: SafeHandle
     {
-        public SafeAlpmHandle SafeAlpmHandle
+        internal TParent ParentHandle
         {
             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
             [PrePrepareMethod]
@@ -16,7 +16,7 @@ namespace Foodsoft.Alpm
 
         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
         [PrePrepareMethod]
-        internal SafeListHandle(SafeAlpmHandle safeAlpmHandle)
+        internal SafeListHandle(IntPtr listPtr, TParent parentHandle)
             : base(IntPtr.Zero, true)
         {
             var success = false;
@@ -24,11 +24,14 @@ namespace Foodsoft.Alpm
             try { }
             finally
             {
-                safeAlpmHandle.DangerousAddRef(ref success);
+                parentHandle.DangerousAddRef(ref success);
                 if (success)
-                    SafeAlpmHandle = safeAlpmHandle;
+                {
+                    ParentHandle = parentHandle;
+                    handle = listPtr;
                 }
 
+            }
             if (!success)
                 throw new ObjectDisposedException(GetType().FullName);
         }
@@ -36,14 +39,14 @@ namespace Foodsoft.Alpm
         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
         protected override bool ReleaseHandle()
         {
-            SafeAlpmHandle.DangerousRelease();
+            ParentHandle.DangerousRelease();
             return true;
         }
 
         public override bool IsInvalid
         {
             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
-            get => SafeAlpmHandle.IsInvalid;
+            get => ParentHandle.IsInvalid;
         }
     }
 }

Alpm/UTF8InMarshaler.cs

@@ -8,7 +8,6 @@ namespace Foodsoft.Alpm
     {
         private static readonly UTF8InMarshaler _instance = default;
 
-
         public void CleanUpManagedData(object managedObj) { }
 
         public void CleanUpNativeData(IntPtr pNativeData)

Alpm/Wrapper.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Foodsoft.Alpm
+{
+    internal static class Wrapper
+    {
+        internal static unsafe IntPtr ListNext(IntPtr list) => ((alpm_list_t*) list)->next;
+        internal static unsafe IntPtr ListData(IntPtr list) => ((alpm_list_t*) list)->data;
+    }
+}

Alpm/alpm.cs

@@ -187,7 +187,7 @@ namespace Foodsoft.Alpm
             string url);
 
         [DllImport(nameof(alpm))]
-        public static extern int alpm_db_unregister(IntPtr db);
+        public static extern int alpm_db_unregister(SafeDatabaseHandle db);
 
         [DllImport(nameof(alpm))]
         [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
@@ -219,7 +219,7 @@ namespace Foodsoft.Alpm
             string name);
 
         [DllImport(nameof(alpm))]
-        public static extern IntPtr alpm_pkg_get_pkgcache(SafeDatabaseHandle db);
+        public static extern IntPtr alpm_db_get_pkgcache(SafeDatabaseHandle db);
 
     }
 }

AlpmOld.cs

@@ -1,21 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Runtime.CompilerServices;
-using System.Runtime.ConstrainedExecution;
-using System.Runtime.InteropServices;
-
-// ReSharper disable MemberCanBePrivate.Global
-// ReSharper disable UnassignedReadonlyField
-// ReSharper disable UnusedMember.Global
-
-// ReSharper disable InconsistentNaming
-
-namespace Foodsoft.Alpm
-{
-    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
-    public struct alpm_pkg_p
-    {
-        private IntPtr ptr;
-    }
-    
-}

DotNetAlpm.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Alpm", "Alpm\Alpm.csproj", "{6AEC7D1A-DA7C-44CB-A339-7CBE5FCB88B1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Samples", "Samples\Samples.csproj", "{1215BE9E-B4F4-4F42-B4A2-E890C5EAA903}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6AEC7D1A-DA7C-44CB-A339-7CBE5FCB88B1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6AEC7D1A-DA7C-44CB-A339-7CBE5FCB88B1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6AEC7D1A-DA7C-44CB-A339-7CBE5FCB88B1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6AEC7D1A-DA7C-44CB-A339-7CBE5FCB88B1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1215BE9E-B4F4-4F42-B4A2-E890C5EAA903}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1215BE9E-B4F4-4F42-B4A2-E890C5EAA903}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1215BE9E-B4F4-4F42-B4A2-E890C5EAA903}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1215BE9E-B4F4-4F42-B4A2-E890C5EAA903}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

DotNetAlpm.sln.DotSettings

@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=alpm/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

Folder.DotSettings

@@ -1,12 +0,0 @@
-<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=alpm/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=cachedir/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=cachedirs/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=Foodsoft/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=libalpm/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=Marshaler/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=siglevel/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=strerror/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=syncdb/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=syncdbs/@EntryIndexedValue">True</s:Boolean>
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=treename/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

IReadOnlyItemsAccessor`1.cs

@@ -1,11 +0,0 @@
-using System;
-
-namespace Foodsoft.Alpm
-{
-    internal interface IReadOnlyItemsAccessor<out TElement>
-    {
-        SafeAlpmHandle SafeAlpmHandle { get; }
-        public IntPtr GetItems();
-        public TElement PtrToItem(IntPtr p);
-    }
-}

Program.cs

@@ -1,27 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Foodsoft.Alpm;
-
-namespace Foodsoft.Alpm
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            ErrNo err = ErrNo.ERR_OK;
-
-            using var h = new Handle("/", "/home/luebsj/db");
-            using var db = h.RegisterSyncDB("jkl-repo", SigLevel.SIG_PACKAGE_OPTIONAL | SigLevel.SIG_USE_DEFAULT);
-
-            db.Servers = new List<string> {"http://a.b.c", "http://d.e.f", "http://arch.johnluebs.com/x86_64"};
-            foreach (var a in db.Servers)
-            {
-                Console.WriteLine("Hello {0}", a);
-            }
-            var b = new string[3];
-            db.Servers.CopyTo(b, 0);
-            Console.WriteLine("Hello World! {0} {1} {2}", db.Name, API.Version,
-                b[0]);
-        }
-    }
-}

ReadOnlyCollectionWrapper`2.cs

@@ -1,47 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Runtime.CompilerServices;
-
-namespace Foodsoft.Alpm
-{
-    internal class ReadOnlyCollectionWrapper<TImpl, TElement> : IReadOnlyCollection<TElement> where TImpl : struct,
-        IReadOnlyItemsAccessor<TElement>
-    {
-        private TImpl _impl;
-        private SafeAlpmHandle SafeAlpmHandle => _impl.SafeAlpmHandle;
-
-        public ReadOnlyCollectionWrapper(TImpl impl)
-        {
-            _impl = impl;
-        }
-
-        private static unsafe IntPtr ListNext(IntPtr list) => ((alpm_list_t*) list)->next;
-        private static unsafe IntPtr ListData(IntPtr list) => ((alpm_list_t*) list)->data;
-        public IEnumerator<TElement> GetEnumerator()
-        {
-            var safeAlpmHandle = _impl.SafeAlpmHandle;
-            var release = false;
-
-            RuntimeHelpers.PrepareConstrainedRegions();
-            try
-            {
-                safeAlpmHandle.DangerousAddRef(ref release);
-                if (!release) throw new ObjectDisposedException(_impl.GetType().FullName);
-                for (var list = _impl.GetItems(); list != IntPtr.Zero; list = ListNext(list))
-                {
-                    yield return _impl.PtrToItem(ListData(list));
-                }
-            }
-            finally
-            {
-                if (release)
-                    safeAlpmHandle.DangerousRelease();
-            }
-        }
-
-        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
-
-        public int Count => (int) alpm.alpm_list_count(_impl.GetItems());
-    }
-}

Samples/Program.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Immutable;
+using Foodsoft.Alpm;
+
+namespace Samples
+{
+    class Program
+    {
+        static void Other()
+        {
+            using var h = new Handle("/", "/home/luebsj/db");
+            using var db = h.RegisterSyncDB("jkl-repo", SigLevel.SIG_PACKAGE_OPTIONAL | SigLevel.SIG_USE_DEFAULT);
+            
+            db.AddServer("http://arch.johnluebs.com/x86_64");
+            db.Update(false);
+            foreach (var a in db.Servers)
+            {
+                Console.WriteLine("Hello {0}", a);
+            }
+
+            var servers = db.Servers;
+            var b = new string[3];
+            var l = db.Servers.ToImmutableList();
+
+            using var cache = db.PackageCache;
+            foreach ( var p in cache) using(p)
+            {
+                Console.WriteLine("Hello: {0} {1} {2}", p.Name, p.Filename, p.BuildDate);
+            }
+            
+            Console.WriteLine("Hello World! {0} {1} {2}", db.Name, API.Version,
+                l[0]);
+        }
+        static void Main(string[] args)
+        {
+            Other();
+        }
+    }
+}

Samples/Samples.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Alpm\Alpm.csproj" />
+    </ItemGroup>
+
+</Project>

Wrapper.cs

@@ -1,7 +0,0 @@
-using System;
-
-namespace Foodsoft.Alpm
-{
-    public class Wrapper
-    { }
-}