GEEKING

Client.LegacyAssemblies/Roblox.System/.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+###################
+# compiled source #
+###################
+*.com
+*.class
+*.dll
+*.exe
+*.pdb
+*.dll.config
+*.cache
+*.suo
+# Include dlls if they’re in the NuGet packages directory
+!/packages/*/lib/*.dll
+# Include dlls if they're in the CommonReferences directory
+!*CommonReferences/*.dll
+####################
+# VS Upgrade stuff #
+####################
+_UpgradeReport_Files/
+###############
+# Directories #
+###############
+bin/
+obj/
+TestResults/
+###################
+# Web publish log #
+###################
+*.Publish.xml
+#############
+# Resharper #
+#############
+/_ReSharper.*
+*.ReSharper.*
+############
+# Packages #
+############
+# it’s better to unpack these files and commit the raw source
+# git has its own built in compression methods
+*.7z
+*.dmg
+*.gz
+*.iso
+*.jar
+*.rar
+*.tar
+*.zip
+######################
+# Logs and databases #
+######################
+*.log
+*.sqlite
+# OS generated files #
+######################
+.DS_Store?
+ehthumbs.db
+Icon?
+Thumbs.db
+
+
+# User-specific files
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+build/
+bld/
+[Bb]in/
+[Oo]bj/
+
+# Visual Studo 2015 cache/options directory
+.vs/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# DNX
+project.lock.json
+artifacts/
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings 
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/packages/repositories.config
+
+# Windows Azure Build Output
+csx/
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+bower_components/
+orleans.codegen.cs
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt

Client.LegacyAssemblies/Roblox.System/NonNullable.cs

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+using System;
+
+namespace Roblox
+{
+    /// <summary>
+    /// Guarantees a non-null instance of type T
+    /// 
+    /// http://docs.google.com/a/roblox.com/Doc?docid=0ATG2rw7nIIsFZGY4ZHcy725MTBnZG5qcDdmbQ&hl=en
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public struct NonNullable<T> where T : class
+    {
+        private readonly T _t;
+
+        internal NonNullable(T t)
+        {
+            _t = t;
+        }
+
+        public T Value
+        {
+            get
+            {
+                if (_t == null)
+                    throw new NullReferenceException("Uninitialized NonNullable of type " + typeof(T).Name);
+                return _t;
+            }
+        }
+
+        public override int GetHashCode()
+        {
+            return Value.GetHashCode();
+        }
+
+        /// <summary>
+        /// Returns the text representation of the value of the current System.Nullable<T> object.
+        /// </summary>
+        public override string ToString()
+        {
+            return Value.ToString();
+        }
+
+        public static implicit operator T(NonNullable<T> n)
+        {
+            return n.Value;
+        }
+
+        public override bool Equals(object other)
+        {
+            // http://msdn.microsoft.com/en-us/library/ms173147(VS.80).aspx
+            if (other == null)
+                return false;
+            return _t == other;
+        }
+
+        public bool Equals(T other)
+        {
+            // http://msdn.microsoft.com/en-us/library/ms173147(VS.80).aspx
+            if (other == null)
+                return false;
+            return this._t == other;
+        }
+
+        public bool Equals(NonNullable<T> other)
+        {
+            // http://msdn.microsoft.com/en-us/library/ms173147(VS.80).aspx
+            // Strictly speaking, _t should never be null,
+            // but we are not allowed to throw in an equal call.
+            // Instead, we follow the rule to return false if the
+            // value compared against is null
+            if (other._t == null)
+                return false;
+            return this._t == other._t;
+        }
+
+        public static bool operator ==(NonNullable<T> a, NonNullable<T> b)
+        {
+            return a._t == b._t;
+        }
+
+        public static bool operator !=(NonNullable<T> a, NonNullable<T> b)
+        {
+            return a._t != b._t;
+        }
+
+        public static NonNullable<T> ToNonNull(T t)
+        {
+            if (t == null)
+                throw new NullReferenceException("Incorrect usage of NonNullable of type " + typeof(T).Name + ". Caller must check for null before calling ToNonNull.");
+            return new NonNullable<T>(t);
+        }
+    }
+
+    public static class NonNullExtensions
+    {
+        /// <summary>
+        /// Safely and efficiently promotes NonNullable types to base classes
+        /// </summary>
+        public static NonNullable<TBase> Convert<T, TBase>(this NonNullable<T> t)
+            where T : class, TBase
+            where TBase : class
+        {
+            return new NonNullable<TBase>(t.Value);
+        }
+
+    }
+}

Client.LegacyAssemblies/Roblox.System/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Roblox.System")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Roblox.System")]
+[assembly: AssemblyCopyright("Copyright ©  2021")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("808df39b-fd2c-43de-ab15-8b991a6948f9")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Client.LegacyAssemblies/Roblox.System/RandomExtensions.cs

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+using System;
+using System.Security.Cryptography;
+
+namespace Roblox
+{
+    /// <summary>
+    /// Inspired by: http://blogs.msdn.com/pfxteam/archive/2009/02/19/9434171.aspx
+    /// </summary>
+    public static class SeededRandom
+    {
+        private static readonly Random Seeder = new Random();
+        private static volatile int _seed = Seeder.Next();
+
+        [ThreadStatic]
+        private static Random _local;
+        private static readonly Random Global = new Random();
+        private static readonly RNGCryptoServiceProvider Crypto = new RNGCryptoServiceProvider();
+
+        // TODO: How/When to dispose?
+        private static readonly System.Threading.Timer Timer = new System.Threading.Timer(
+            (o) => _seed = Seeder.Next(), null, 100, 100);
+
+        /// <summary>
+        /// Creates a seeded Random number generator.
+        /// Avoids a clump of equally-seeded Random objects being created at the same time.
+        /// Use this if you spawn multiple threads at the same time and each creates a Random.
+        /// </summary>
+        public static Random Create()
+        {
+            // We simply increase the seed by 1 every time.
+            // The timer will change the seed to something more interesting in the future
+            return new Random(System.Threading.Interlocked.Increment(ref _seed));
+        }
+
+
+        /// <summary>
+        /// Creates and re-uses a single Random number object per thread.
+        /// Best used in situations where you re-use threads a lot.
+        /// </summary>
+        /// <returns></returns>
+        public static Random ThreadStaticCreate()
+        {
+            Random inst = _local;
+            if (inst == null)
+            {
+                int seed;
+                lock (Global)
+                    seed = Global.Next();
+                _local = inst = new Random(seed);
+            }
+            return inst;
+        }
+
+
+        /// <summary>
+        /// An alternate approach to SeededRandom that uses Crypto and no lock
+        /// TBD which one is faster
+        /// </summary>
+        public static Random CryptoThreadStaticCreate()
+        {
+            Random inst = _local;
+            if (inst == null)
+            {
+                var buffer = new byte[4];
+                Crypto.GetBytes(buffer);
+                _local = inst = new Random(BitConverter.ToInt32(buffer, 0));
+            }
+            return inst;
+        }
+    }
+}

Client.LegacyAssemblies/Roblox.System/Roblox.System.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{808DF39B-FD2C-43DE-AB15-8B991A6948F9}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Roblox.System</RootNamespace>
+    <AssemblyName>Roblox.System</AssemblyName>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <Deterministic>true</Deterministic>
+    <TargetFrameworkProfile />
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="NonNullable.cs" />
+    <Compile Include="RandomExtensions.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>