Initial Client/Server Communication

#1
Followed the MagicOnion quickstart guide, borrowing code from the chat sample app to get something working

Assets/Scripts/MagicOnion/Utils/DynamicAssembly.cs

@@ -0,0 +1,98 @@
+#if NON_UNITY || !NET_STANDARD_2_0
+
+using System;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.CompilerServices;
+
+namespace MagicOnion.Utils
+{
+#if ENABLE_SAVE_ASSEMBLY
+    public
+#else
+    internal
+#endif
+        class DynamicAssembly
+    {
+        readonly object gate = new object();
+
+#if ENABLE_SAVE_ASSEMBLY
+        readonly string moduleName;
+#endif
+        readonly AssemblyBuilder assemblyBuilder;
+        readonly ModuleBuilder moduleBuilder;
+
+        // don't expose ModuleBuilder(should use lock)
+        // public ModuleBuilder ModuleBuilder { get { return moduleBuilder; } }
+
+        public DynamicAssembly(string moduleName)
+        {
+#if ENABLE_SAVE_ASSEMBLY
+            this.moduleName = moduleName;
+            this.assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(moduleName), AssemblyBuilderAccess.RunAndSave);
+            this.moduleBuilder = assemblyBuilder.DefineDynamicModule(moduleName, moduleName + ".dll");
+#else
+            this.assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(moduleName), AssemblyBuilderAccess.Run);
+            this.moduleBuilder = assemblyBuilder.DefineDynamicModule(moduleName);
+#endif
+
+            // HACK: Allow access to `internal` classes from dynamically generated assembly.
+            // https://www.strathweb.com/2018/10/no-internalvisibleto-no-problem-bypassing-c-visibility-rules-with-roslyn/
+            var ignoreAccessChecksTo = new CustomAttributeBuilder(typeof(IgnoresAccessChecksToAttribute).GetConstructor(new[] {typeof(string)}), new []{ "MagicOnion" });
+            this.assemblyBuilder.SetCustomAttribute(ignoreAccessChecksTo);
+        }
+
+        // requires lock on mono environment(for example, UnityEditor). see: https://github.com/neuecc/MessagePack-CSharp/issues/161
+
+        public TypeBuilder DefineType(string name, TypeAttributes attr)
+        {
+            lock (gate)
+            {
+                return moduleBuilder.DefineType(name, attr);
+            }
+        }
+
+        public TypeBuilder DefineType(string name, TypeAttributes attr, Type parent)
+        {
+            lock (gate)
+            {
+                return moduleBuilder.DefineType(name, attr, parent);
+            }
+        }
+
+        public TypeBuilder DefineType(string name, TypeAttributes attr, Type parent, Type[] interfaces)
+        {
+            lock (gate)
+            {
+                return moduleBuilder.DefineType(name, attr, parent, interfaces);
+            }
+        }
+
+#if ENABLE_SAVE_ASSEMBLY
+
+        public AssemblyBuilder Save()
+        {
+            assemblyBuilder.Save(moduleName + ".dll");
+            return assemblyBuilder;
+        }
+
+#endif
+    }
+}
+
+
+namespace System.Runtime.CompilerServices
+{
+    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
+    internal class IgnoresAccessChecksToAttribute : Attribute
+    {
+        public IgnoresAccessChecksToAttribute(string assemblyName)
+        {
+            AssemblyName = assemblyName;
+        }
+
+        public string AssemblyName { get; }
+    }
+}
+
+#endif