Program.cs

using System;
using System.Reflection;
using System.Reflection.Emit;

class Program
{
    static void Main()
    {
        var myType = CreateDynamicType();
        var myObject = Activator.CreateInstance(myType);
        
        var nameProperty = myType.GetProperty("Name");
        nameProperty.SetValue(myObject, "Jane Doe");

        Console.WriteLine($"Name: {nameProperty.GetValue(myObject)}");
    }

    static Type CreateDynamicType()
    {
        var assemblyName = new AssemblyName("DynamicAssembly");
        var assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
        var moduleBuilder = assemblyBuilder.DefineDynamicModule("MainModule");
        var typeBuilder = moduleBuilder.DefineType("DynamicType", TypeAttributes.Public);

        var fieldBuilder = typeBuilder.DefineField("_name", typeof(string), FieldAttributes.Private);
        var propertyBuilder = typeBuilder.DefineProperty("Name", PropertyAttributes.HasDefault, typeof(string), null);

        var getMethodBuilder = typeBuilder.DefineMethod("get_Name", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, typeof(string), Type.EmptyTypes);
        var getIL = getMethodBuilder.GetILGenerator();
        getIL.Emit(OpCodes.Ldarg_0);
        getIL.Emit(OpCodes.Ldfld, fieldBuilder);
        getIL.Emit(OpCodes.Ret);

        var setMethodBuilder = typeBuilder.DefineMethod("set_Name", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, null, new[] { typeof(string) });
        var setIL = setMethodBuilder.GetILGenerator();
        setIL.Emit(OpCodes.Ldarg_0);
        setIL.Emit(OpCodes.Ldarg_1);
        setIL.Emit(OpCodes.Stfld, fieldBuilder);
        setIL.Emit(OpCodes.Ret);

        propertyBuilder.SetGetMethod(getMethodBuilder);
        propertyBuilder.SetSetMethod(setMethodBuilder);

        return typeBuilder.CreateType();
    }
}