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    <p>Something like this))</p> <pre><code>public abstract class DynamicClass { public override string ToString() { PropertyInfo[] props = this.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public); StringBuilder sb = new StringBuilder(); sb.Append("{"); for (int i = 0; i &lt; props.Length; i++) { if (i &gt; 0) sb.Append(", "); sb.Append(props[i].Name); sb.Append("="); sb.Append(props[i].GetValue(this, null)); } sb.Append("}"); return sb.ToString(); } } //DynamicTypeFactory public static class ExpressionHelper //simplified { private const string DYNAMIC_ASSEMBLY_NAME = "DynamicAssembly"; private const string DYNAMIC_MODULE_NAME = "DynamicModule"; private const string DYNAMIC_CLASS_PREFIX = "DynamicClass"; private static ModuleBuilder _moduleBuilder; [SecurityCritical] static ExpressionHelper() { //var assemblyName = new AssemblyName(DYNAMIC_ASSEMBLY_NAME); AssemblyBuilder assembly = Thread.GetDomain().DefineDynamicAssembly(new AssemblyName(DYNAMIC_ASSEMBLY_NAME), AssemblyBuilderAccess.Run); assembly.GetName().SetPublicKey(Assembly.GetExecutingAssembly().GetName().GetPublicKey()); assembly.GetName().SetPublicKeyToken(Assembly.GetExecutingAssembly().GetName().GetPublicKeyToken()); _moduleBuilder = assembly.DefineDynamicModule(DYNAMIC_MODULE_NAME, true); } public static Type CreateType(IDictionary&lt;string, Type&gt; propertyTypes) { var typeName = DYNAMIC_CLASS_PREFIX + propertyTypes.GetHashCode().ToString(); TypeBuilder typeBuilder = _moduleBuilder.DefineType(typeName, TypeAttributes.Class | TypeAttributes.Public, typeof(DynamicClass)); FieldInfo[] fields = GenerateProperties(typeBuilder, propertyTypes); GenerateEquals(typeBuilder, fields); GenerateGetHashCode(typeBuilder, fields); Type result = typeBuilder.CreateType(); return result; } public static object CreateObject(IDictionary&lt;string, object&gt; propertyValues) { var propertyTypes = propertyValues.ToDictionary(pair =&gt; pair.Key, pair =&gt; pair.Value == null ? typeof(object) : pair.Value.GetType()); var type = CreateType(propertyTypes); Expression targetExpression = Expression.New(type.GetConstructors()[0]); var lambda = Expression.Lambda(targetExpression); var target = lambda.Compile().DynamicInvoke(); List&lt;MemberBinding&gt; bindings = new List&lt;MemberBinding&gt;(); foreach (var pair in propertyValues) { bindings.Add(Expression.Bind(type.GetProperty(pair.Key), Expression.Constant(pair.Value))); } return Expression.Lambda(Expression.MemberInit(Expression.New(type), bindings.ToArray())).Compile().DynamicInvoke(); } private static FieldInfo[] GenerateProperties(TypeBuilder typeBuilder, IDictionary&lt;string, Type&gt; propertyTypes) { FieldInfo[] fields = new FieldBuilder[propertyTypes.Count]; for (int i = 0; i &lt; propertyTypes.Count; i++) { var dp = propertyTypes.ElementAt(i); var fb = typeBuilder.DefineField("&lt;" + dp.Key + "&gt;k__BackingField", dp.Value, FieldAttributes.Private); //HasDefault? var pb = typeBuilder.DefineProperty(dp.Key, PropertyAttributes.HasDefault, dp.Value, null); var mbGet = typeBuilder.DefineMethod("get_" + dp.Key, MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, dp.Value, Type.EmptyTypes); var getterGenerator = mbGet.GetILGenerator(); getterGenerator.Emit(OpCodes.Ldarg_0); getterGenerator.Emit(OpCodes.Ldfld, fb); getterGenerator.Emit(OpCodes.Ret); //setterBuilder MethodBuilder mbSet = typeBuilder.DefineMethod("set_" + dp.Key, MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, null, new Type[] { dp.Value }); //setterILGenerator var setterGenerator = mbSet.GetILGenerator(); setterGenerator.Emit(OpCodes.Ldarg_0); setterGenerator.Emit(OpCodes.Ldarg_1); setterGenerator.Emit(OpCodes.Stfld, fb); setterGenerator.Emit(OpCodes.Ret); pb.SetGetMethod(mbGet); pb.SetSetMethod(mbSet); fields[i] = fb; } return fields; } private static void GenerateEquals(TypeBuilder typeBuilder, FieldInfo[] fields) { var mb = typeBuilder.DefineMethod("Equals", MethodAttributes.Public | MethodAttributes.ReuseSlot | MethodAttributes.Virtual | MethodAttributes.HideBySig, typeof(bool), new Type[] { typeof(object) }); var generator = mb.GetILGenerator(); var other = generator.DeclareLocal(typeBuilder); var next = generator.DefineLabel(); generator.Emit(OpCodes.Ldarg_1); generator.Emit(OpCodes.Isinst, typeBuilder); generator.Emit(OpCodes.Stloc, other); generator.Emit(OpCodes.Ldloc, other); generator.Emit(OpCodes.Brtrue_S, next); generator.Emit(OpCodes.Ldc_I4_0); generator.Emit(OpCodes.Ret); generator.MarkLabel(next); foreach (var field in fields) { var ft = field.FieldType; var ct = typeof(EqualityComparer&lt;&gt;).MakeGenericType(ft); next = generator.DefineLabel(); generator.EmitCall(OpCodes.Call, ct.GetMethod("get_Default"), null); generator.Emit(OpCodes.Ldarg_0); generator.Emit(OpCodes.Ldfld, field); generator.Emit(OpCodes.Ldloc, other); generator.Emit(OpCodes.Ldfld, field); generator.EmitCall(OpCodes.Callvirt, ct.GetMethod("Equals", new Type[] { ft, ft }), null); generator.Emit(OpCodes.Brtrue_S, next); generator.Emit(OpCodes.Ldc_I4_0); generator.Emit(OpCodes.Ret); generator.MarkLabel(next); } generator.Emit(OpCodes.Ldc_I4_1); generator.Emit(OpCodes.Ret); } private static void GenerateGetHashCode(TypeBuilder typeBuilder, FieldInfo[] fields) { var mb = typeBuilder.DefineMethod("GetHashCode", MethodAttributes.Public | MethodAttributes.ReuseSlot | MethodAttributes.Virtual | MethodAttributes.HideBySig, typeof(int), Type.EmptyTypes); var generator = mb.GetILGenerator(); generator.Emit(OpCodes.Ldc_I4_0); foreach (FieldInfo field in fields) { var ft = field.FieldType; var ct = typeof(EqualityComparer&lt;&gt;).MakeGenericType(ft); generator.EmitCall(OpCodes.Call, ct.GetMethod("get_Default"), null); generator.Emit(OpCodes.Ldarg_0); generator.Emit(OpCodes.Ldfld, field); generator.EmitCall(OpCodes.Callvirt, ct.GetMethod("GetHashCode", new Type[] { ft }), null); generator.Emit(OpCodes.Xor); } generator.Emit(OpCodes.Ret); } } </code></pre> <p>using:</p> <pre><code>var obj = ExpressionHelper.CreateObject(new Dictionary&lt;string, object&gt;() { {"testInt32Property", int.MaxValue}, {"testStringProperty", "TestString"} }); </code></pre>
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    1. PODynamically convert a list of properties into an object
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    1. USSalientBrain
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    1. COThanks, good to know ! C# is sometimes so filthy^^
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      1. USProfet
 

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