Implement two example plugins (MongoDB connection wrapper and consumer of this conn wrapper) which is sharing types between them

src/ZirconiumPlugins/MongoDB/MongoDB.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="../../Zirconium/Zirconium.csproj">
+      <ExcludeAssets>runtime</ExcludeAssets>
+    </ProjectReference>
+    <PackageReference Include="MongoDB.Bson" Version="2.10.4" />
+    <PackageReference Include="MongoDB.Driver" Version="2.10.4" />
+    <PackageReference Include="MongoDB.Driver.Core" Version="2.10.4" />
+  </ItemGroup>
+
+</Project>

src/ZirconiumPlugins/MongoDB/Plugin.cs

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+using System.Collections.Immutable;
+using System.Collections.Generic;
+using Zirconium.Core.Plugins.Interfaces;
+using MongoDB.Driver;
+using Zirconium.Core.Logging;
+
+namespace MongoDBPlugin
+{
+    class Plugin : IPluginAPI
+    {
+        private IMongoDatabase _database;
+
+        public dynamic GetExportedAPI()
+        {
+            return _database;
+        }
+
+        public System.Type[] GetExportedTypes()
+        {
+            // var mongoCore = Assembly.Load("MongoDB.Driver.Core");
+            // var mongoBson = Assembly.Load("MongoDB.Bson");
+            return new System.Type[] {typeof(IMongoDatabase)};
+        }
+
+        public string GetPluginUniqueName()
+        {
+            return "MongoDB";
+        }
+
+        public void Initialize(IPluginHostAPI pluginHostAPI)
+        {
+            var settingsDynamic = pluginHostAPI.GetSettings(this);
+            var settings = (IImmutableDictionary<string, dynamic>) ((IDictionary<string, object>)settingsDynamic).ToImmutableDictionary();
+
+            var host = (string) settings.GetValueOrDefault("Host");
+            var port = (int) settings.GetValueOrDefault("Port");
+            var user = (string) settings.GetValueOrDefault("User");
+            var password = (string) settings.GetValueOrDefault("Password");
+            var database = (string) settings.GetValueOrDefault("Database");
+
+            MongoClient client;
+            if (user == null && password == null)
+            {
+                client = new MongoClient($"mongodb://{host}:{port}");
+            }
+            else
+            {
+                client = new MongoClient($"mongodb://{user}:{password}@{host}:{port}");
+            }
+
+            var db = client.GetDatabase(database);
+            Log.Info("MongoDB is connected");
+            _database = db;
+        }
+
+        public void PreInitialize(IPluginManager pluginManager) { }
+    }
+}

src/ZirconiumPlugins/TestMongoDB/Plugin.cs

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+using Zirconium.Core.Plugins.Interfaces;
+using MongoDB.Driver;
+using Zirconium.Core.Logging;
+using System;
+
+namespace TestMongoDB
+{
+    class Plugin : IPluginAPI
+    {
+        private IMongoDatabase _database;
+
+        public dynamic GetExportedAPI()
+        {
+            return null;
+        }
+
+        public Type[] GetExportedTypes()
+        {
+            return null;
+        }
+
+        public string GetPluginUniqueName()
+        {
+            return "TestMongoDB";
+        }
+
+        public void Initialize(IPluginHostAPI pluginHostAPI)
+        {
+            var tm = new TestModel();
+            tm.ABC = "qweqowie";
+            _database.GetCollection<TestModel>("test_model").InsertOne(tm);
+        }
+
+        public void PreInitialize(IPluginManager pluginManager)
+        {
+            var db = pluginManager.Depends(this, "MongoDB");
+            var receivedType = db.GetType();
+            Log.Debug(db.GetType().FullName);
+            Log.Debug(db.GetType().AssemblyQualifiedName);
+            foreach (Type i in db.GetType().GetInterfaces()) {
+                Log.Debug("DB object interface: " + i.AssemblyQualifiedName);
+            }
+            Log.Debug("Type info in current assembly context:");
+            var mongoDBType = typeof(IMongoDatabase);
+            Log.Debug(mongoDBType.FullName);
+            Log.Debug(mongoDBType.AssemblyQualifiedName);
+            Log.Debug(new Uri(mongoDBType.Module.Assembly.CodeBase).LocalPath);
+            Log.Debug($"Casting compatibility: {mongoDBType.IsAssignableFrom(db.GetType())}");
+            _database = (IMongoDatabase) db;
+        }
+    }
+
+    class TestModel
+    {
+        public string ABC { get; set; }
+    }
+}

src/ZirconiumPlugins/TestMongoDB/TestMongoDB.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="../../Zirconium/Zirconium.csproj">
+      <ExcludeAssets>runtime</ExcludeAssets>
+    </ProjectReference>
+    <ProjectReference Include="../MongoDB/MongoDB.csproj"/>
+
+  </ItemGroup>
+
+</Project>