C# Cheat Sheet

C# Language Cheat Sheet: Built-In C# Methods With Descriptions

Conversion Methods

ToBoolean

Converts a type to a Boolean value, where possible

ToByte

Converts a type to a byte

ToChar

Converts a type to a single Unicode character, where possible

ToDateTime

Converts a type (integer or string type) to date-time structures

ToDecimal

Converts a floating point or integer type to a decimal type

ToDouble

Converts a type to a double type

ToInt16

Converts a type to a 16-bit integer

ToInt32

Converts a type to a 32-bit integer

ToInt64

Converts a type to a 64-bit integer

ToSbyte

Converts a type to a signed byte type.

ToSingle

Converts a type to a small floating point number

ToString

Converts a type to a string

ToType

Converts a type to a specified type

ToUInt16

Converts a type to an unsigned int type

ToUInt32

Converts a type to an unsigned long type

ToUInt64

Converts a type to an unsigned big integer

Regex Class Methods

public bool IsMatch(string input)

Indicates whether the regular expression specified in the Regex constructor finds a match in a specified input string

public bool IsMatch(string input, int startat)

Indicates whether the regular expression specified in the Regex constructor finds a match in the specified input string, beginning at the specified starting position in the string

public static bool IsMatch(string input, string pattern)

Indicates whether the specified regular expression finds a match in the specified input string

public MatchCollection Matches(string input)

Searches the specified input string for all occurrences of a regular expression

public string Replace(string input, string replacement)

In a specified input string, replaces all strings that match a regular expression pattern with a specified replacement string

public string[] Split(string input)

Splits an input string into an array of substrings at the positions defined by a regular expression pattern specified in the Regex constructor

Thread Class Methods

public void Abort()

Raises a ThreadAbortException in the thread on which it is invoked, to begin the process of terminating the thread. Calling this method usually terminates the thread

public static LocalDataStoreSlot AllocateDataSlot()

Allocates an unnamed data slot on all the threads. For better performance, use fields that are marked with the ThreadStaticAttribute attribute instead

public static LocalDataStoreSlot AllocateNamedDataSlot(string name)

Allocates a named data slot on all threads. For better performance, use fields that are marked with the ThreadStaticAttribute attribute instead

public static void BeginCriticalRegion()

Notifies a host that execution is about to enter a region of code in which the effects of a thread abort or unhandled exception might jeopardize other tasks in the application domain

public static void BeginThreadAffinity()

Notifies a host that managed code is about to execute instructions that depend on the identity of the current physical operating system thread

public static void EndCriticalRegion()

Notifies a host that execution is about to enter a region of code in which the effects of a thread abort or unhandled exception are limited to the current task

public static void EndThreadAffinity()

Notifies a host that managed code has finished executing instructions that depend on the identity of the current physical operating system thread

public static void FreeNamedDataSlot(string name)

Eliminates the association between a name and a slot, for all threads in the process. For better performance, use fields that are marked with the ThreadStaticAttribute attribute instead

public static Object GetData(LocalDataStoreSlot slot)

Retrieves the value from the specified slot on the current thread, within the current thread's current domain. For better performance, use fields that are marked with the ThreadStaticAttribute attribute instead

public static AppDomain GetDomain()

Returns the current domain in which the current thread is running

public static AppDomain GetDomainID()

Returns a unique application domain identifier

public static LocalDataStoreSlot GetNamedDataSlot(string name)

Looks up a named data slot. For better performance, use fields that are marked with the ThreadStaticAttribute attribute instead

public void Interrupt()

Interrupts a thread that is in the WaitSleepJoin thread state

public void Join()

Blocks the calling thread until a thread terminates, while continuing to perform standard COM and SendMessage pumping. This method has different overloaded forms

public static void MemoryBarrier()

Synchronizes memory access as follows: The processor executing the current thread cannot reorder instructions in such a way that memory accesses prior to the call to MemoryBarrier execute after memory accesses that follow the call to MemoryBarrier

public static void ResetAbort()

Cancels an Abort requested for the current thread

public static void SetData(LocalDataStoreSlot slot, Object data)

Sets the data in the specified slot on the currently running thread, for that thread's current domain. For better performance, use fields marked with the ThreadStaticAttribute attribute instead

public void Start()

Starts a thread

public static void Sleep(int millisecondsTimeout)

Makes the thread pause for a period of time

public static void SpinWait(int iterations)

Causes a thread to wait the number of times defined by the iterations parameter

public static byte VolatileRead(ref byte address)

public static double VolatileRead(ref double address)

public static int VolatileRead(ref int address)

public static Object VolatileRead(ref Object address)

Reads the value of a field. The value is the latest written by any processor in a computer, regardless of the number of processors or the state of processor cache. This method has different overloaded forms. Only some are given above

public static void VolatileWrite(ref byte address,byte value)

public static void VolatileWrite(ref double address, double value)

public static void VolatileWrite(ref int address, int value)

public static void VolatileWrite(ref Object address, Object value)

Writes a value to a field immediately, so that the value is visible to all processors in the computer. This method has different overloaded forms. Only some are given above

public static bool Yield()

Causes the calling thread to yield execution to another thread that is ready to run on the current processor. The operating system selects the thread to yield to