从数据库动态生成enum类（示例）

        public TypeInfo GetBusinessUnitEnum() 
        {
            // Create a dynamic assembly in the current application domain,
            // and allow it to be executed and saved to disk.
            AssemblyName assemblyName = new AssemblyName( nameof(CBOP.Service.Advertising));
            AssemblyBuilder assBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.RunAndCollect);

            // Define a dynamic module in "TempAssembly" assembly. For a single-
            // module assembly, the module has the same name as the assembly.
            ModuleBuilder mb = assBuilder.DefineDynamicModule(nameof(CBOP.Service.Advertising));

            // Define a public enumeration with the name "Elevation" and an
            // underlying type of Integer.
            EnumBuilder eb = mb.DefineEnum(nameof(CBOP.Service.Advertising)+"BusinessUnitEnum", TypeAttributes.Public, typeof(int));

            var targetEnum=_enumConfigRep.Where(_ => _.EnumType == _businessUnitIdForET);
            // Define two members, "High" and "Low".
            foreach (var item in targetEnum)
            {
                eb.DefineLiteral(item.EnumValue,item.EnumId);
            }
            // Create the type and save the assembly.
            var finished = eb.CreateTypeInfo();
            WriteEnum(finished);
            return finished;
        }

        private void WriteEnum(TypeInfo info)
        {
            var myEnum = Activator.CreateInstance(info);
            _loger.Info($"{(info.IsPublic ? "public" : "private")} {(info.IsEnum ? "enum" : "class")} {info.Name}");
            _loger.Info("{");
            var names = Enum.GetNames(info);
            int[] values = (int[])Enum.GetValues(info);
            int i = 0;
            foreach (var item in names)
            {
                _loger.Info($" {item} = {values[i]}");
                i++;
            }
            _loger.Info("}");
        }

　　

参考：

C# 反射与特性(十)：EMIT 构建代码

EnumBuilder Class