System typeinitializationexception ошибка

private static void Main(string[] args)
{
    string str = null;
    Logger.InitUserLogWithRotation();            // <--- error occur
    ...
}

When I build project, it has no error. But When I execute it, it always aborted.

I tried to debug project , but System.TypeInitializationException error occurred at first line.

I’ve already tried to googling , yet found no solution.

It seems like any variable initialize code is wrong , but can’t find it.

Please help me. I’m new to C#.

Thanks.

※ Here is Logger Class Code

public class Logger
{
    private static int HDLOG_PRIORITY_DEBUG = 4;
    private static int HDLOG_PRIORITY_ERROR = 1;
    private static int HDLOG_PRIORITY_FATAL = 0;
    private static int HDLOG_PRIORITY_INFO = 3;
    private static int HDLOG_PRIORITY_WARNING = 2;
    public static int LOG_LEVEL_DEBUG = 4;
    public static int LOG_LEVEL_ERROR = 2;
    public static int LOG_LEVEL_FATAL = 1;
    public static int LOG_LEVEL_INFO = 5;
    public static int LOG_LEVEL_WARNING = 3;
    private static string s_bstCommonAppData = Path.Combine(s_commonAppData, "XXXX");
    private static string s_bstUserDataDir = Path.Combine(s_bstCommonAppData, "UserData");
    private static string s_commonAppData = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
    private static bool s_consoleLogging = false;
    private static FileStream s_fileStream;
    public static HdLoggerCallback s_HdLoggerCallback;
    private static string s_logDir = null;
    private static string s_logFileName = "XXXX";
    private static string s_logFilePath = null;
    public static int s_logFileSize = 0xa00000;
    private static bool s_loggerInited = false;
    private static string s_logLevels = null;
    private static int s_logRotationTime = 0x7530;
    private static string s_logStringDebug = "DEBUG";
    private static string s_logStringError = "ERROR";
    private static string s_logStringFatal = "FATAL";
    private static string s_logStringInfo = "INFO";
    private static string s_logStringWarning = "WARNING";
    private static int s_processId = -1;
    private static string s_processName = "Unknown";
    private static object s_sync = new object();
    public static int s_totalLogFileNum = 5;
    private static TextWriter writer = Console.Error;

    private static void Close()
    {
        if (!s_consoleLogging)
        {
            writer.Close();
            s_fileStream.Dispose();
            writer.Dispose();
        }
    }

    public static void Debug(string msg)
    {
        Debug("{0}", new object[] { msg });
    }

    public static void Debug(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_DEBUG, s_processName, fmt, args);
    }

    private static void DoLogRotation()
    {
    Label_0000:
        Thread.Sleep(s_logRotationTime);
        try
        {
            lock (s_sync)
            {
                FileInfo info = new FileInfo(s_logFilePath);
                if (info.Length >= s_logFileSize)
                {
                    string destFileName = s_logFilePath + ".1";
                    string path = s_logFilePath + "." + s_totalLogFileNum;
                    if (File.Exists(path))
                    {
                        File.Delete(path);
                    }
                    for (int i = s_totalLogFileNum - 1; i >= 1; i--)
                    {
                        string str3 = s_logFilePath + "." + i;
                        string str4 = s_logFilePath + "." + (i + 1);
                        if (File.Exists(str3))
                        {
                            File.Move(str3, str4);
                        }
                    }
                    File.Move(s_logFilePath, destFileName);
                }
            }
            goto Label_0000;
        }
        catch (Exception)
        {
            goto Label_0000;
        }
    }

    public static void Error(string msg)
    {
        Error("{0}", new object[] { msg });
    }

    public static void Error(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_ERROR, s_processName, fmt, args);
    }

    public static void Fatal(string msg)
    {
        Fatal("{0}", new object[] { msg });
    }

    public static void Fatal(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_FATAL, s_processName, fmt, args);
    }

    private static string GetLogDir(bool userSpecificLog)
    {
        string str;
        if (s_logDir != null)
        {
            return s_logDir;
        }
        try
        {
            if (userSpecificLog)
            {
                str = Path.Combine(s_bstUserDataDir, "Logs");
            }
            else
            {
                str = (string) Registry.LocalMachine.OpenSubKey(@"Software\XXXX").GetValue("LogDir");
            }
        }
        catch (Exception)
        {
            str = Path.Combine(s_bstUserDataDir, "Logs");
        }
        s_logDir = str;
        return str;
    }

    private static string GetPrefix(string tag, string logLevel)
    {
        int managedThreadId = Thread.CurrentThread.ManagedThreadId;
        DateTime now = DateTime.Now;
        return string.Format("{0:D4}-{1:D2}-{2:D2} {3:D2}:{4:D2}:{5:D2}.{6:D3} {7}:{8:X8} ({9}). {10}: ", new object[] { now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second, now.Millisecond, s_processId, managedThreadId, tag, logLevel });
    }

    public static TextWriter GetWriter()
    {
        return new Writer(delegate (string msg) {
            Print(msg);
        });
    }

    private static void HdLogger(int prio, uint tid, string tag, string msg)
    {
        int level = 0;
        if (prio == HDLOG_PRIORITY_FATAL)
        {
            level = LOG_LEVEL_FATAL;
        }
        else if (prio == HDLOG_PRIORITY_ERROR)
        {
            level = LOG_LEVEL_ERROR;
        }
        else if (prio == HDLOG_PRIORITY_WARNING)
        {
            level = LOG_LEVEL_WARNING;
        }
        else if (prio == HDLOG_PRIORITY_INFO)
        {
            level = LOG_LEVEL_INFO;
        }
        else if (prio == HDLOG_PRIORITY_DEBUG)
        {
            level = LOG_LEVEL_DEBUG;
        }
        Print(level, tag, "{0:X8}: {1}", new object[] { tid, msg });
    }

    public static void Info(string msg)
    {
        Info("{0}", new object[] { msg });
    }

    public static void Info(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_INFO, s_processName, fmt, args);
    }

    public static void InitConsoleLog()
    {
        InitLog("-", true, false);
    }

    public static void InitLog(string logFileName, bool userSpecificLog, bool doLogRotation)
    {
        s_loggerInited = true;
        s_HdLoggerCallback = new HdLoggerCallback(Logger.HdLogger);
        s_processId = Process.GetCurrentProcess().Id;
        s_processName = Process.GetCurrentProcess().ProcessName;
        if (logFileName == "-")
        {
            writer = Console.Error;
            s_consoleLogging = true;
        }
        else
        {
            if (logFileName == null)
            {
                logFileName = s_logFileName;
            }
            if (userSpecificLog)
            {
                logFileName = logFileName + "Users";
            }
            string logDir = GetLogDir(userSpecificLog);
            string str2 = string.Format(@"{0}\{1}.log", logDir, logFileName);
            if (!Directory.Exists(logDir))
            {
                Directory.CreateDirectory(logDir);
            }
            s_logFilePath = str2;
            LogLevelsInit();
            lock (s_sync)
            {
                Open();
            }
            if (doLogRotation)
            {
                new Thread(() => DoLogRotation()) { IsBackground = true }.Start();
            }
        }
    }

    public static void InitSystemLog()
    {
        InitLog(null, false, false);
    }

    public static void InitSystemLogWithRotation()
    {
        InitLog(null, false, true);
    }

    public static void InitUserLog()
    {
        InitLog(null, true, false);
    }

    public static void InitUserLogWithRotation()
    {
        InitLog(null, true, true);
    }

    private static bool IsLogLevelEnabled(string tag, string level)
    {
        if (s_logLevels == null)
        {
            return false;
        }
        return (s_logLevels.StartsWith("ALL") || s_logLevels.Contains((tag + ":" + level).ToUpper()));
    }

    private static void LogLevelsInit()
    {
        string name = @"Software\XXXX\Config";
        try
        {
            using (RegistryKey key = Registry.LocalMachine.OpenSubKey(name))
            {
                s_logLevels = (string) key.GetValue("DebugLogs");
            }
        }
        catch (Exception)
        {
            return;
        }
        if (s_logLevels != null)
        {
            s_logLevels = s_logLevels.ToUpper();
        }
    }

    private static void Open()
    {
        if (!s_consoleLogging)
        {
            if (!s_loggerInited)
            {
                InitLog("-", false, false);
                s_loggerInited = true;
            }
            else
            {
                s_fileStream = new FileStream(s_logFilePath, FileMode.Append, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite);
                writer = new StreamWriter(s_fileStream, Encoding.UTF8);
            }
        }
    }

    public static void Print(string msg)
    {
        Print("{0}", new object[] { msg });
    }

    public static void Print(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_INFO, s_processName, fmt, args);
    }

    public static void Print(int level, string tag, string fmt, params object[] args)
    {
        string str = "UNKNOWN";
        if (level == LOG_LEVEL_FATAL)
        {
            str = s_logStringFatal;
        }
        else if (level == LOG_LEVEL_ERROR)
        {
            str = s_logStringError;
        }
        else if (level == LOG_LEVEL_WARNING)
        {
            str = s_logStringWarning;
        }
        else if (level == LOG_LEVEL_INFO)
        {
            str = s_logStringInfo;
        }
        else if (level == LOG_LEVEL_DEBUG)
        {
            str = s_logStringDebug;
        }
        if ((level != LOG_LEVEL_DEBUG) || IsLogLevelEnabled(tag, str))
        {
            lock (s_sync)
            {
                Open();
                writer.WriteLine(GetPrefix(tag, str) + fmt, args);
                writer.Flush();
                Close();
            }
        }
    }

    public static void SetLogDir(string logDir)
    {
        s_logDir = logDir;
    }

    public static void Warning(string msg)
    {
        Warning("{0}", new object[] { msg });
    }

    public static void Warning(string fmt, params object[] args)
    {
        Print(LOG_LEVEL_WARNING, s_processName, fmt, args);
    }

    public delegate void HdLoggerCallback(int prio, uint tid, string tag, string msg);

    public class Writer : TextWriter
    {
        private WriteFunc writeFunc;

        public Writer(WriteFunc writeFunc)
        {
            this.writeFunc = writeFunc;
        }

        public override void WriteLine(string msg)
        {
            this.writeFunc(msg);
        }

        public override void WriteLine(string fmt, object obj)
        {
            this.writeFunc(string.Format(fmt, obj));
        }

        public override void WriteLine(string fmt, object[] objs)
        {
            this.writeFunc(string.Format(fmt, objs));
        }

        public override System.Text.Encoding Encoding
        {
            get
            {
                return System.Text.Encoding.UTF8;
            }
        }

        public delegate void WriteFunc(string msg);
    }
}

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• C# volatile Example
• C# WebBrowser Control (Navigate Method)
• C# WebClient: DownloadData, Headers
• C# Where Method and Keyword
• C# Math.Pow Method, Exponents
• C# String CompareOrdinal() method
• C# String TrimStart() method
• C# Math.Round Examples: MidpointRounding
• C# String CompareTo() method
• C# Math Type
• C# Reverse String
• C# String Concat() method
• C# Max and Min: Get Highest or Lowest Element
• C# Reverse Words
• C# Reverse Extension Method
• C# RichTextBox Example
• C# String Contains() method
• C# MemoryFailPoint and InsufficientMemoryException
• C# String CopyTo() method
• C# partial Keyword
• C# ToBase64String (Data URI Image)
• C# Path.ChangeExtension
• C# Struct Versus Class
• C# struct Examples
• C# Path Exists Example
• C# Path.GetExtension: File Extension
• C# Path.GetRandomFileName Method
• C# Pragma Directive
• C# Predicate (Lambda That Returns True or False)
• C# Pretty Date Format (Hours or Minutes Ago)
• C# PreviewKeyDown Event
• C# Substring Examples
• C# Numeric Suffix Examples
• C# switch Examples
• C# Convert Degrees Celsius to Fahrenheit
• C# Convert Dictionary to List
• C# Convert Dictionary to String (Write to File)
• C# Convert List to Array
• C# Convert List to DataTable (DataGridView)
• C# Convert List to String
• C# Convert Miles to Kilometers
• C# Convert Milliseconds, Seconds, Minutes
• C# Convert Nanoseconds, Microseconds, Milliseconds
• C# Console.Read Method
• C# Console.ReadKey Example
• C# Console.ReadLine Example (While Loop)
• C# Console.SetOut and Console.SetIn
• C# Intersect: Get Common Elements
• C# InvalidCastException
• C# InvalidOperationException: Collection Was Modified
• C# Console.WindowHeight
• C# DriveInfo Examples
• C# IOException Type: File, Directory Not Found
• C# Right String Part
• C# RNGCryptoServiceProvider Example
• C# Property Examples
• C# PropertyGrid: Windows Forms
• C# Protected and internal Keywords
• C# Public and private Methods
• C# Console.Write, Append With No Newline
• C# Console.WriteLine (Print)
• C# DropDownItems Control
• C# IOrderedEnumerable (Query Expression With orderby)
• C# is: Cast Examples
• C# Remove Punctuation From String
• C# Query Windows Forms (Controls.OfType)
• C# Queryable: IQueryable Interface and AsQueryable
• ASP.NET QueryString Examples
• C# Queue Collection: Enqueue
• C# const Example
• C# Constraint Puzzle Solver
• C# IComparable Example, CompareTo: Sort Objects
• C# RadioButton Use: Windows Forms
• C# ReadOnlyCollection Use (ObjectModel)
• C# Recursion Optimization
• C# Recursive File List: GetFiles With AllDirectories
• C# ref Keyword
• C# Reflection Examples
• C# Regex.Escape and Unescape Methods
• C# Count Characters in String
• C# Count, Dictionary (Get Number of Keys)
• C# IDictionary Generic Interface
• C# IEnumerable Examples
• C# IsFixedSize, IsReadOnly and IsSynchronized Arrays
• C# Count Letter Frequencies
• C# IList Generic Interface: List and Array
• C# string.IsNullOrEmpty, IsNullOrWhiteSpace
• C# IsSorted Method: If Array Is Already Sorted
• C# ROT13 Method, Char Lookup Table
• C# StringBuilder Examples
• C# StringComparison and StringComparer
• C# StringReader Class (Get Parts of Strings)
• C# Count Extension Method: Use Lambda to Count
• C# Image Type
• C# ImageList Use: Windows Forms
• C# string.Copy Method
• C# CopyTo String Method: Put Chars in Array
• C# value Keyword
• C# Empty String Examples
• C# ValueTuple Examples (System.ValueTuple, ToTuple)
• C# ValueType Examples
• C# String Equals Examples
• C# String For Loop, Count Spaces in String
• C# string.Intern and IsInterned
• C# Variable Initializer for Class Field
• C# String IsUpper, IsLower
• C# String Length Property: Get Character Count
• C# Token
• C# String EndsWith() method
• C# ToList Extension Method
• C# String Equals() method
• C# String IsNormalized() method
• C# ToLookup Method (Get ILookup)
• C# String Format() method
• C# ToLower and ToUpper: Uppercase and Lowercase Strings
• C# String IndexOf() method
• C# TabControl: Windows Forms
• TableLayoutPanel: Windows Forms
• ToolStripContainer Control: Dock, Properties
• C# ToolTip: Windows Forms
• C# ToString Integer Optimization
• C# String Insert() method
• C# Take and TakeWhile Examples
• C# Task Examples (Task.Run, ContinueWith and Wait)
• C# Ternary Operator
• C# Text Property: Windows Forms
• C# TextBox.AppendText Method
• C# TextBox Example
• C# TextChanged Event
• C# TextFieldParser Examples: Read CSV
• C# ToString: Get String From Object
• C# String Intern(String str) method
• C# String IsInterned() method
• C# ToTitleCase Method
• C# TrackBar: Windows Forms
• C# Tree and Nodes Example: Directed Acyclic Word Graph
• C# TreeView Tutorial
• C# String Normalize() method
• C# Convert String Array to String
• C# Jagged Array Examples
• C# MemoryStream: Use Stream on Byte Array
• C# MenuStrip: Windows Forms
• C# int.MaxValue, MinValue (Get Lowest Number)
• C# Program to reverse number
• C# Modulo Operator: Get Remainder From Division
• C# MonthCalendar Control: Windows Forms
• C# Int and uint Types
• C# Integer Append Optimization
• C# Keywords
• C# Label Example: Windows Forms
• C# Lambda Expressions
• C# LastIndexOf Examples
• C# Last, LastOrDefault Methods
• C# Convert TimeSpan to Long
• C# Convert Types
• C# join Examples (LINQ)
• C# Multiple Return Values
• C# Multiply Numbers
• C# Mutex Example (OpenExisting)
• C# Named Parameters
• C# String GetEnumerator() method
• C# String GetHashCode() method
• C# KeyCode Property and KeyDown
• C# namespace Keyword
• C# NameValueCollection Usage
• C# Nested Lists: Create 2D List or Jagged List
• C# Nested Switch Statement
• C# Copy Dictionary
• C# KeyNotFoundException: Key Not Present in Dictionary
• C# KeyValuePair Examples
• C# Environment.NewLine
• C# Let Keyword (Use Variable in Query Expression)
• C# Levenshtein Distance
• C# Regex Versus Loop: Use For Loop Instead of Regex
• C# Regex.Match Examples: Regular Expressions
• C# RemoveAll: Use Lambda to Delete From List
• C# Replace String Examples
• ASP.NET Response.BinaryWrite
• ASP.NET Response.Write
• C# Return Optimization: out Performance
• C# Count Elements in Array and List
• C# SelectMany Example: LINQ
• C# Sentinel Optimization
• C# SequenceEqual Method (If Two Arrays Are Equal)
• C# Shift Operators (Bitwise)
• C# Short and ushort Types
• C# Single Method: Get Element If Only One Matches
• C# SingleOrDefault
• C# Singleton Pattern Versus Static Class
• C# Singleton Class
• C# sizeof Keyword
• C# Skip and SkipWhile Examples
• C# Sleep Method (Pause)
• C# Sort Dictionary: Keys and Values
• C# String Literal: Newline and Quote Examples
• C# LinkLabel Example: Windows Forms
• C# LINQ
• C# List Add Method, Append Element to List
• C# List AddRange, InsertRange (Append Array to List)
• C# List Clear Example
• C# List Contains Method
• C# List Remove Examples
• C# List Examples
• C# ListBox Tutorial (DataSource, SelectedIndex)
• C# ListView Tutorial: Windows Forms
• C# SaveFileDialog: Use ShowDialog and FileName
• C# Scraping HTML Links
• C# sealed Keyword
• C# Seek File Examples: ReadBytes
• C# select new Example: LINQ
• C# ThreadStart and ParameterizedThreadStart
• C# Extension Method
• C# StringBuilder Capacity
• C# extern alias Example
• C# StringBuilder Clear (Set Length to Zero)
• C# StringBuilder Data Types
• C# StringBuilder Performance
• C# Select Method (Use Lambda to Modify Elements)
• C# StringBuilder Equals (If Chars Are Equal)
• C# StringBuilder Memory
• C# Convert Feet, Inches
• C# StringBuilder ToString: Get String From StringBuilder
• C# Serialize List (Write to File With BinaryFormatter)
• C# Maze Pathfinding Algorithm
• C# Memoization
• C# Memory Usage for Arrays of Objects
• C# MessageBox.Show Examples
• C# Method Call Depth Performance
• C# Method Parameter Performance
• C# Method Size Optimization
• C# throw Keyword Examples
• C# Timer Examples
• C# TimeSpan Examples
• C# StringWriter Class
• C# async, await Examples
• C# Attribute Examples
• C# Average Method
• C# BackgroundWorker
• C# base Keyword
• C# String Between, Before, After
• C# Binary Representation int (Convert, toBase 2)
• C# BinarySearch List
• C# bool Array (Memory Usage, One Byte Per Element)
• C# bool.Parse, TryParse: Convert String to Bool
• C# bool Type
• C# Change Characters in String (ToCharArray, For Loop)
• C# FromOADate and Excel Dates
• C# Char Combine: Get String From Chars
• C# Generic Class, Generic Method Examples
• C# char.IsDigit (If Char Is Between 0 and 9)
• C# CSV Methods (Parse and Segment)
• C# GetEnumerator: While MoveNext, Get Current
• C# GetHashCode (String Method)
• C# Thumbnail Image With GetThumbnailImage
• C# char.IsLower and IsUpper
• C# Character Literal (const char)
• C# DataRow Field Method: Cast DataTable Cell
• C# GetType Method
• C# Global Variable Examples (Public Static Property)
• ASP.NET Global Variables Example
• C# Char Lowercase Optimization
• C# Char Test (If Char in String Equals a Value)
• C# char.ToLower and ToUpper
• C# Get Day Count Elapsed From DateTime
• C# DateTime Format
• C# Group By Operator: LINQ
• GroupBox: Windows Forms
• C# char Examples
• C# DateTime.Now (Current Time)
• C# GroupBy Method: LINQ
• C# GroupJoin Method
• C# Array Length Property, Get Size of Array
• C# GZipStream Example (DeflateStream)
• C# abstract Keyword
• C# Action Object (Lambda That Returns Void)
• C# DateTime.Today (Current Day With Zero Time)
• C# DateTime.TryParse and TryParseExact
• C# DateTime Examples
• C# DateTimePicker Example
• C# Debug.Write Examples
• C# Visual Studio Debugging Tutorial
• C# decimal Examples
• C# HashSet Examples
• C# Hashtable Examples
• C# delegate Keyword
• C# descending, ascending Keywords
• C# while Loop Examples
• C# Whitespace Methods: Convert UNIX, Windows Newlines
• C# XmlReader, Parse XML File
• C# XmlTextReader
• C# XmlTextWriter
• C# XmlWriter, Create XML File
• C# XOR Operator (Bitwise)
• C# yield Example
• C# File.Delete
• C# File Equals: Compare Files
• C# File.Exists Method
• C# TrimEnd and TrimStart
• C# True and False
• C# Truncate String
• C# String ToLower() method
• C# History
• C# Features
• C# Variables
• C# Data Types
• C# float Numbers
• C# Settings.settings in Visual Studio
• C# Shuffle Array: KeyValuePair and List
• C# Single and Double Types
• C# try Keyword
• C# TryGetValue (Get Value From Dictionary)
• C# Tuple Examples
• C# Trim Strings
• C# String IsNullOrEmpty() method
• C# Type Class: Returned by typeof, GetType
• C# Word Count
• C# Thread Methods
• C# String IsNullOrWhiteSpace() method
• C# Single Instance Windows Form
• C# TypeInitializationException
• C# String Join() method
• C# Word Interop: Microsoft.Office.Interop.Word
• C# String LastIndexOf() method
• FlowLayoutPanel Control
• C# Focused Property
• C# FolderBrowserDialog Control
• C# Font Type: FontFamily and FontStyle
• C# FontDialog Example
• C# for Loop Examples
• C# foreach Loop Examples
• ForeColor, BackColor: Windows Forms
• C# Form: Event Handlers
• C# Contains String Method
• C# Union: Combine and Remove Duplicate Elements
• C# XElement Example (XElement.Load, XName)
• C# String LastIndexOfAny() method
• C# Snippet Examples
• C# Sort DateTime List
• C# Sort List With Lambda, Comparison Method
• C# Sort Number Strings
• C# Sort Examples: Arrays and Lists
• C# SortedDictionary
• C# SortedList
• C# SortedSet Examples
• C# Unreachable Code Detected
• C# Unsafe Keyword: Fixed, Pointers
• C# Uppercase First Letter
• C# Uri and UriBuilder Classes
• C# String PadLeft() method
• C# Split String Examples
• C# Zip Method (Use Lambda on Two Collections)
• C# String PadRight() method
• C# Nullable
• C# String Copy() method
• C# Using Alias Example
• C# using Statement: Dispose and IDisposable
• C# File.Move Method, Rename File
• C# String Remove() method
• C# Array.Resize Examples
• C# Array.Sort: Keys, Values and Ranges
• C# Operators
• C# Keywords
• C# Button Example
• C# Byte Array: Memory Usage, Read All Bytes
• C# Byte and sbyte Types
• C# Capacity for List, Dictionary
• C# Case Insensitive Dictionary
• C# case Example (Switch Case)
• C# Char Array
• C# Array.Reverse Example
• C# Random Lowercase Letter
• C# Random Paragraphs and Sentences
• C# Array Slice, Get Elements Between Indexes
• C# Array.TrueForAll: Use Lambda to Test All Elements
• C# Random String
• C# Checked and Unchecked Keywords
• C# ArrayTypeMismatchException
• C# as: Cast Examples
• C# Random Number Examples
• C# Assign Variables Optimization
• C# ASCII Table
• C# ASCII Transformation, Convert Char to Index
• C# CheckedListBox: Windows Forms
• C# AsEnumerable Method
• C# AsParallel Example
• ASP.NET AspLiteral
• C# Line Count for File
• C# Sort by File Size
• C# Line Directive
• C# Sort, Ignore Leading Chars
• C# Sort KeyValuePair List: CompareTo
• C# LinkedList
• C# Sort Strings by Length
• C# List CopyTo (Copy List Elements to Array)
• C# List Equals (If Elements Are the Same)
• C# List Find and Exists Examples
• C# List Insert Performance
• C# Thread.SpinWait Example
• ASP.NET LiteralControl Example
• C# Locality Optimizations (Memory Hierarchy)
• C# lock Keyword
• C# Long and ulong Types
• C# Loop Over String Chars: Foreach, For
• C# Loop Over String Array
• C# Math.Sqrt Method

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