packages/System.Linq.Dynamic.Core.1.0.7.13/src/System.Linq.Dynamic.Core/DynamicClassFactory.cs

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#if !(UAP10_0)
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq.Dynamic.Core.Validation;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading;
using JetBrains.Annotations;
#if WINDOWS_APP
using System.Linq;
#endif

namespace System.Linq.Dynamic.Core
{
    /// <summary>
    /// A factory to create dynamic classes, based on <see href="http://stackoverflow.com/questions/29413942/c-sharp-anonymous-object-with-properties-from-dictionary" />.
    /// </summary>
    public static class DynamicClassFactory
    {
        // EmptyTypes is used to indicate that we are looking for someting without any parameters. 
        private static readonly Type[] EmptyTypes = new Type[0];

        private static readonly ConcurrentDictionary<string, Type> GeneratedTypes = new ConcurrentDictionary<string, Type>();

        private static readonly ModuleBuilder ModuleBuilder;

        // Some objects we cache
        private static readonly CustomAttributeBuilder CompilerGeneratedAttributeBuilder = new CustomAttributeBuilder(typeof(CompilerGeneratedAttribute).GetConstructor(EmptyTypes), new object[0]);
        private static readonly CustomAttributeBuilder DebuggerBrowsableAttributeBuilder = new CustomAttributeBuilder(typeof(DebuggerBrowsableAttribute).GetConstructor(new[] { typeof(DebuggerBrowsableState) }), new object[] { DebuggerBrowsableState.Never });
        private static readonly CustomAttributeBuilder DebuggerHiddenAttributeBuilder = new CustomAttributeBuilder(typeof(DebuggerHiddenAttribute).GetConstructor(EmptyTypes), new object[0]);

        private static readonly ConstructorInfo ObjectCtor = typeof(object).GetConstructor(EmptyTypes);
#if WINDOWS_APP || DOTNET5_1 || UAP10_0 || NETSTANDARD
        private static readonly MethodInfo ObjectToString = typeof(object).GetMethod("ToString", BindingFlags.Instance | BindingFlags.Public);
#else
        private static readonly MethodInfo ObjectToString = typeof(object).GetMethod("ToString", BindingFlags.Instance | BindingFlags.Public, null, EmptyTypes, null);
#endif

        private static readonly ConstructorInfo StringBuilderCtor = typeof(StringBuilder).GetConstructor(EmptyTypes);
#if WINDOWS_APP || DOTNET5_1 || UAP10_0 || NETSTANDARD
        private static readonly MethodInfo StringBuilderAppendString = typeof(StringBuilder).GetMethod("Append", new[] { typeof(string) });
        private static readonly MethodInfo StringBuilderAppendObject = typeof(StringBuilder).GetMethod("Append", new[] { typeof(object) });
#else
        private static readonly MethodInfo StringBuilderAppendString = typeof(StringBuilder).GetMethod("Append", BindingFlags.Instance | BindingFlags.Public, null, new[] { typeof(string) }, null);
        private static readonly MethodInfo StringBuilderAppendObject = typeof(StringBuilder).GetMethod("Append", BindingFlags.Instance | BindingFlags.Public, null, new[] { typeof(object) }, null);
#endif

        private static readonly Type EqualityComparer = typeof(EqualityComparer<>);
        private static readonly Type EqualityComparerGenericArgument = EqualityComparer.GetGenericArguments()[0];
#if WINDOWS_APP || DOTNET5_1 || UAP10_0 || NETSTANDARD
        private static readonly MethodInfo EqualityComparerDefault = EqualityComparer.GetMethod("get_Default", BindingFlags.Static | BindingFlags.Public);
        private static readonly MethodInfo EqualityComparerEquals = EqualityComparer.GetMethod("Equals", new[] { EqualityComparerGenericArgument, EqualityComparerGenericArgument });
        private static readonly MethodInfo EqualityComparerGetHashCode = EqualityComparer.GetMethod("GetHashCode", new[] { EqualityComparerGenericArgument });
#else
        private static readonly MethodInfo EqualityComparerDefault = EqualityComparer.GetMethod("get_Default", BindingFlags.Static | BindingFlags.Public, null, EmptyTypes, null);
        private static readonly MethodInfo EqualityComparerEquals = EqualityComparer.GetMethod("Equals", BindingFlags.Instance | BindingFlags.Public, null, new[] { EqualityComparerGenericArgument, EqualityComparerGenericArgument }, null);
        private static readonly MethodInfo EqualityComparerGetHashCode = EqualityComparer.GetMethod("GetHashCode", BindingFlags.Instance | BindingFlags.Public, null, new[] { EqualityComparerGenericArgument }, null);