.

useful exceptions in c#


   

mscorlib

 

AbandonedMutexException

The exception that is thrown when one
thread acquires a System.Threading.Mutex object that another thread has
abandoned by exiting without releasing it.

AccessViolationException

The exception that is thrown when there
is an attempt to read or write protected memory.

AmbiguousMatchException

The exception that is thrown when
binding to a member results in more than one member matching the binding
criteria. This class cannot be inherited.

AppDomainUnloadedException

The exception that is thrown when an
attempt is made to access an unloaded application domain.

ApplicationException

The exception that is thrown when a
non-fatal application error occurs.

ArgumentException

The exception that is thrown when one
of the arguments provided to a method is not valid.

ArgumentNullException

The exception that is thrown when a
null reference (Nothing in Visual Basic) is passed to a method that does not
accept it as a valid argument.

ArgumentOutOfRangeException

The exception that is thrown when the
value of an argument is outside the allowable range of values as defined by
the invoked method.

ArithmeticException

The exception that is thrown for
errors in an arithmetic, casting, or conversion operation.

ArrayTypeMismatchException

The exception that is thrown when an
attempt is made to store an element of the wrong type within an array.

ASSERT

 

BadImageFormatException

The exception that is thrown when the
file image of a DLL or an executable program is invalid.

CannotUnloadAppDomainException

The exception that is thrown when an
attempt to unload an application domain fails.

COMException

The exception that is thrown when an
unrecognized HRESULT is returned from a COM method call.

ContextMarshalException

The exception that is thrown when an
attempt to marshal an object across a context boundary fails.

CryptographicException

The exception that is thrown when an
error occurs during a cryptographic operation.

CryptographicUnexpectedOperationException

The exception that is thrown when an
unexpected operation occurs during a cryptographic operation.

CustomAttributeFormatException

The exception that is thrown when the
binary format of a custom attribute is invalid.

DataMisalignedException

The exception that is thrown when a
unit of data is read from or written to an address that is not a multiple of
the data size. This class cannot be inherited.

DecoderFallbackException

The exception that is thrown when a
decoder fallback operation fails. This class cannot be inherited.

DirectoryNotFoundException

The exception that is thrown when
part of a file or directory cannot be found.

DivideByZeroException

The exception that is thrown when
there is an attempt to divide an integral or decimal value by zero.

DllNotFoundException

The exception that is thrown when a
DLL specified in a DLL import cannot be found.

DriveNotFoundException

The exception that is thrown when
trying to access a drive or share that is not available.

DuplicateWaitObjectException

The exception that is thrown when an
object appears more than once in an array of synchronization objects.

EncoderFallbackException

The exception that is thrown when an
encoder fallback operation fails. This class cannot be inherited.

EndOfStreamException

The exception that is thrown when
reading is attempted past the end of a stream.

EntryPointNotFoundException

The exception that is thrown when an
attempt to load a class fails due to the absence of an entry method.

ExecutionEngineException

The exception that is thrown when
there is an internal error in the execution engine of the common language
runtime. This class cannot be inherited.

ExternalException

The base exception type for all COM
interop exceptions and structured exception handling (SEH) exceptions.

FieldAccessException

The exception that is thrown when
there is an invalid attempt to access a private or protected field inside a
class.

FileLoadException

The exception that is thrown when a
managed assembly is found but cannot be loaded.

FileNotFoundException

The exception that is thrown when an
attempt to access a file that does not exist on disk fails.

FormatException

The exception that is thrown when the
format of an argument does not meet the parameter specifications of the
invoked method.

HostProtectionException

The exception that is thrown when a
denied host resource is detected.

IdentityNotMappedException

Represents an exception for a
principal whose identity could not be mapped to a known identity.

IndexOutOfRangeException

The exception that is thrown when an
attempt is made to access an element of an array with an index that is
outside the bounds of the array. This class cannot be inherited.

InsufficientMemoryException

The exception that is thrown when a
check for sufficient available memory fails. This class cannot be inherited.

InvalidCastException

The exception that is thrown for
invalid casting or explicit conversion.

InvalidComObjectException

The exception thrown when an invalid
COM object is used.

InvalidFilterCriteriaException

The exception that is thrown in
System.Type.FindMembers(System.Reflection.MemberTypes,
System.Reflection.BindingFlags, System.Reflection.MemberFilter,
System.Object) when the filter criteria is not valid for the type of filter
you are using.

InvalidOleVariantTypeException

The exception thrown by the marshaler
when it encounters an argument of a variant type that can not be marshaled to
managed code.

InvalidOperationException

The exception that is thrown when a
method call is invalid for the object's current state.

InvalidProgramException

The exception that is thrown when a
program contains invalid Microsoft intermediate language (MSIL) or metadata.
Generally this indicates a bug in the compiler that generated the program.

IOException

The exception that is thrown when an
I/O error occurs.

IsolatedStorageException

The exception that is thrown when an
operation in isolated storage fails.

KeyNotFoundException

The exception that is thrown when the
key specified for accessing an element in a collection does not match any key
in the collection.

MarshalDirectiveException

The exception that is thrown by the
marshaler when it encounters a
System.Runtime.InteropServices.MarshalAsAttribute it does not support.

MemberAccessException

The exception that is thrown when an
attempt to access a class member fails.

MetadataException

 

MethodAccessException

The exception that is thrown when
there is an invalid attempt to access a private or protected method inside a
class.

MissingFieldException

The exception that is thrown when
there is an attempt to dynamically access a field that does not exist.

MissingManifestResourceException

The exception thrown if the main
assembly does not contain the resources for the neutral culture, and they are
required because of a missing appropriate satellite assembly.

MissingMemberException

The exception that is thrown when
there is an attempt to dynamically access a class member that does not exist.

MissingMethodException

The exception that is thrown when
there is an attempt to dynamically access a method that does not exist.

MissingSatelliteAssemblyException

The exception that is thrown when the
satellite assembly for the resources of the neutral culture is missing.

MulticastNotSupportedException

The exception that is thrown when
there is an attempt to combine two delegates based on the System.Delegate
type instead of the System.MulticastDelegate type. This class cannot be
inherited.

NotFiniteNumberException

The exception that is thrown when a
floating-point value is positive infinity, negative infinity, or Not-a-Number
(NaN).

NotImplementedException

The exception that is thrown when a
requested method or operation is not implemented.

NotSupportedException

The exception that is thrown when an
invoked method is not supported, or when there is an attempt to read, seek,
or write to a stream that does not support the invoked functionality.

NullReferenceException

The exception that is thrown when
there is an attempt to dereference a null object reference.

ObjectDisposedException

The exception that is thrown when an
operation is performed on a disposed object.

OperationCanceledException

The exception that is thrown in a
thread upon cancellation of an operation that the thread was executing.

OutOfMemoryException

The exception that is thrown when
there is not enough memory to continue the execution of a program.

OverflowException

The exception that is thrown when an
arithmetic, casting, or conversion operation in a checked context results in
an overflow.

PathTooLongException

The exception that is thrown when a
pathname or filename is longer than the system-defined maximum length.

PlatformNotSupportedException

The exception that is thrown when a
feature does not run on a particular platform.

PolicyException

The exception that is thrown when
policy forbids code to run.

PrivilegeNotHeldException

The exception that is thrown when a
method in the System.Security.AccessControl namespace attempts to enable a
privilege that it does not have.

RankException

The exception that is thrown when an
array with the wrong number of dimensions is passed to a method.

ReflectionTypeLoadException

The exception that is thrown by the
System.Reflection.Module.GetTypes method if any of the classes in a module
cannot be loaded. This class cannot be inherited.

RemotingException

The exception that is thrown when
something has gone wrong during remoting.

RemotingTimeoutException

The exception that is thrown when the
server or the client cannot be reached for a previously specified period of
time.

RuntimeWrappedException

Wraps an exception that does not
derive from the System.Exception class. This class cannot be inherited.

SafeArrayRankMismatchException

The exception thrown when the rank of
an incoming SAFEARRAY does not match the rank specified in the managed
signature.

SafeArrayTypeMismatchException

The exception thrown when the type of
the incoming SAFEARRAY does not match the type specified in the managed
signature.

SecurityException

The exception that is thrown when a
security error is detected.

SEHException

Represents Structured Exception
Handler (SEH) errors.

SerializationException

The exception thrown when an error
occurs during serialization or deserialization.

ServerException

The exception that is thrown to
communicate errors to the client when the client connects to non-.NET
Framework applications that cannot throw exceptions.

StackOverflowException

The exception that is thrown when the
execution stack overflows because it contains too many nested method calls.
This class cannot be inherited.

SynchronizationLockException

The exception that is thrown when a
method requires the caller to own the lock on a given Monitor, and the method
is invoked by a caller that does not own that lock.

SystemException

Defines the base class for predefined
exceptions in the System namespace.

TargetException

Represents the exception that is
thrown when an attempt is made to invoke an invalid target.

TargetInvocationException

The exception that is thrown by
methods invoked through reflection. This class cannot be inherited.

TargetParameterCountException

The exception that is thrown when the
number of parameters for an invocation does not match the number expected.
This class cannot be inherited.

ThreadAbortException

The exception that is thrown when a
call is made to the System.Threading.Thread.Abort(System.Object) method. This
class cannot be inherited.

ThreadInterruptedException

The exception that is thrown when a
System.Threading.Thread is interrupted while it is in a waiting state.

ThreadStartException

The exception that is thrown when a
failure occurs in a managed thread after the underlying operating system
thread has been started, but before the thread is ready to execute user code.

ThreadStateException

The exception that is thrown when a
System.Threading.Thread is in an invalid System.Threading.Thread.ThreadState
for the method call.

TimeoutException

The exception that is thrown when the
time allotted for a process or operation has expired.

TypeInitializationException

The exception that is thrown as a
wrapper around the exception thrown by the class initializer. This class
cannot be inherited.

TypeLoadException

The exception that is thrown when
type-loading failures occur.

TypeUnloadedException

The exception that is thrown when
there is an attempt to access an unloaded class.

UnauthorizedAccessException

The exception that is thrown when the
operating system denies access because of an I/O error or a specific type of
security error.

VerificationException

The exception that is thrown when the
security policy requires code to be type safe and the verification process is
unable to verify that the code is type safe.

WaitHandleCannotBeOpenedException

The exception that is thrown when an
attempt is made to open a system mutex or semaphore that does not exist.

XmlSyntaxException

The exception that is thrown when
there is a syntax error in XML parsing. This class cannot be inherited.

   

System

 

AuthenticationException

The exception that is thrown when
authentication fails for an authentication stream.

CheckoutException

The exception that is thrown when an
attempt to check out a file that is checked into a source code management
program is canceled or fails.

ConfigurationException

The exception that is thrown when a
configuration system error has occurred.

CookieException

The exception that is thrown when an
error is made adding a System.Net.Cookie to a System.Net.CookieContainer.

HttpListenerException

The exception that is thrown when an
error occurs processing an HTTP request.

InternalBufferOverflowException

The exception thrown when the
internal buffer overflows.

InternalException

 

InvalidAsynchronousStateException

Thrown when a thread on which an
operation should execute no longer exists or has no message loop.

InvalidCredentialException

The exception that is thrown when
authentication fails for an authentication stream and cannot be retried.

InvalidDataException

The exception that is thrown when a
data stream is in an invalid format.

InvalidEnumArgumentException

The exception thrown when using
invalid arguments that are enumerators.

LicenseException

Represents the exception thrown when
a component cannot be granted a license.

NetworkInformationException

The exception that is thrown when an
error occurs while retrieving network information.

PingException

The exception that is thrown when a
System.Net.NetworkInformation.Ping.Send or
System.Net.NetworkInformation.Ping.SendAsync method calls a method that
throws an exception.

ProtocolViolationException

The exception that is thrown when an
error is made while using a network protocol.

SemaphoreFullException

The exception that is thrown when the
System.Threading.Semaphore.Release method is called on a semaphore whose
count is already at the maximum.

SettingsPropertyIsReadOnlyException

Provides an exception for read-only
System.Configuration.SettingsProperty objects.

SettingsPropertyNotFoundException

Provides an exception for
System.Configuration.SettingsProperty objects that are not found.

SettingsPropertyWrongTypeException

Provides an exception that is thrown
when an invalid type is used with a System.Configuration.SettingsProperty
object.

SmtpException

Represents the exception that is
thrown when the System.Net.Mail.SmtpClient is not able to complete a
System.Net.Mail.SmtpClient.Send or System.Net.Mail.SmtpClient.SendAsync
operation.

SmtpFailedRecipientException

Represents the exception that is
thrown when the System.Net.Mail.SmtpClient is not able to complete a
System.Net.Mail.SmtpClient.Send or System.Net.Mail.SmtpClient.SendAsync
operation to a particular recipient.

SmtpFailedRecipientsException

The exception that is thrown when
e-mail is sent using an System.Net.Mail.SmtpClient and cannot be delivered to
all recipients.

SocketException

The exception that is thrown when a
socket error occurs.

UriFormatException

The exception that is thrown when an
invalid Uniform Resource Identifier (URI) is detected.

WarningException

Specifies an exception that is
handled as a warning instead of an error.

WebException

The exception that is thrown when an
error occurs while accessing the network through a pluggable protocol.

Win32Exception

Throws an exception for a Win32 error
code.

   

System.Configuration

 

ConfigurationErrorsException

The current value is not one of the
System.Web.Configuration.PagesSection.EnableSessionState values.

ProviderException

The exception that is thrown when a
configuration provider error has occurred. This exception class is also used
by providers to throw exceptions when internal errors occur within the
provider that do not map to other pre-existing exception classes.

   

System.Core

 

AssertionException

 

AssumptionException

 

EventLogException

Represents the base class for all the
exceptions that are thrown when an error occurs while reading event log
related information.

EventLogInvalidDataException

Represents the exception thrown when
an event provider publishes invalid data in an event.

EventLogNotFoundException

Represents the exception that is
thrown when a requested event log (usually specified by the name of the event
log or the path to the event log file) does not exist.

EventLogProviderDisabledException

Represents the exception that is
thrown when a specified event provider name references a disabled event
provider. A disabled event provider cannot publish events.

EventLogReadingException

Represents an exception that is
thrown when an error occurred while reading, querying, or subscribing to the
events in an event log.

InstanceNotFoundException

The exception thrown to indicate that
no instances are returned by a provider.

InstrumentationBaseException

Represents the base provider-related
exception.

InstrumentationException

Represents a provider-related
exception.

InvalidTimeZoneException

The exception that is thrown when
time zone information is invalid.

InvariantException

 

LockRecursionException

The exception that is thrown when
recursive entry into a lock is not compatible with the recursion policy for
the lock.

PostconditionException

 

PreconditionException

 

SystemCore_EnumerableDebugViewEmptyException

 

TimeZoneNotFoundException

The exception that is thrown when a
time zone cannot be found.

   

System.Data

 

ConstraintException

Represents the exception that is
thrown when attempting an action that violates a constraint.

DataException

Represents the exception that is
thrown when errors are generated using ADO.NET components.

DBConcurrencyException

The exception that is thrown by the
System.Data.Common.DataAdapter during an insert, update, or delete operation
if the number of rows affected equals zero.

DbException

The base class for all exceptions
thrown on behalf of the data source.

DeletedRowInaccessibleException

Represents the exception that is
thrown when an action is tried on a System.Data.DataRow that has been
deleted.

DuplicateNameException

Represents the exception that is
thrown when a duplicate database object name is encountered during an add
operation in a System.Data.DataSet -related object.

EvaluateException

Represents the exception that is
thrown when the System.Data.DataColumn.Expression property of a
System.Data.DataColumn cannot be evaluated.

InRowChangingEventException

Represents the exception that is
thrown when you call the System.Data.DataRow.EndEdit method within the
System.Data.DataTable.RowChanging event.

InvalidConstraintException

Represents the exception that is
thrown when incorrectly trying to create or access a relation.

InvalidExpressionException

Represents the exception that is
thrown when you try to add a System.Data.DataColumn that contains an invalid
System.Data.DataColumn.Expression to a System.Data.DataColumnCollection.

InvalidUdtException

Thrown when SQL Server or the ADO.NET
System.Data.SqlClient provider detects an invalid user-defined type (UDT).

MissingPrimaryKeyException

Represents the exception that is
thrown when you try to access a row in a table that has no primary key.

ModuleLoadException

 

ModuleLoadExceptionHandlerException

 

NoNullAllowedException

Represents the exception that is
thrown when you try to insert a null value into a column where
System.Data.DataColumn.AllowDBNull is set to false.

OdbcException

The exception that is generated when
a warning or error is returned by an ODBC data source. This class cannot be
inherited.

OleDbException

The exception that is thrown when the
underlying provider returns a warning or error for an OLE DB data source.
This class cannot be inherited.

OperationAbortedException

This exception is thrown when an
ongoing operation is aborted by the user.

ReadOnlyException

Represents the exception that is
thrown when you try to change the value of a read-only column.

RowNotInTableException

Represents the exception that is
thrown when you try to perform an operation on a System.Data.DataRow that is
not in a System.Data.DataTable.

SqlAlreadyFilledException

The
System.Data.SqlTypes.SqlAlreadyFilledException class is not intended for use
as a stand-alone component, but as a class from which other classes derive
standard functionality.

SqlException

The exception that is thrown when SQL
Server returns a warning or error. This class cannot be inherited.

SqlNotFilledException

The
System.Data.SqlTypes.SqlNotFilledException class is not intended for use as a
stand-alone component, but as a class from which other classes derive
standard functionality.

SqlNullValueException

The exception that is thrown when the
Value property of a System.Data.SqlTypes structure is set to null.

SqlTruncateException

The exception that is thrown when you
set a value into a System.Data.SqlTypes structure would truncate that value.

SqlTypeException

The base exception class for the
System.Data.SqlTypes.

StrongTypingException

The exception that is thrown by a
strongly typed System.Data.DataSet when the user accesses a DBNull value.

SyntaxErrorException

Represents the exception that is
thrown when the System.Data.DataColumn.Expression property of a
System.Data.DataColumn contains a syntax error.

TypedDataSetGeneratorException

The exception that is thrown when a
name conflict occurs while generating a strongly typed System.Data.DataSet.

VersionNotFoundException

Represents the exception that is
thrown when you try to return a version of a System.Data.DataRow that has
been deleted.

   

System.Data.Entity

 

EntityCommandCompilationException

Represents errors that occur during
command compilation; when a command tree could not be produced to represent
the command text.

EntityCommandExecutionException

Represents errors that occur when the
underlying storage provider could not execute the specified command. This
exception usually wraps a provider-specific exception.

EntityException

Represents Entity Framework-related
errors that occur in the EntityClient namespace. The EntityException is the
base class for all Entity Framework exceptions thrown by the EntityClient.

EntitySqlException

Represents errors that occur when
parsing Entity SQL command text. This exception is thrown when syntactic or
semantic rules are violated.

InternalMappingException

 

InvalidCommandTreeException

The exception that is thrown to
indicate that a command tree is invalid.

MappingException

The exception that is thrown when
mapping related service requests fail.

MetadataException

The exception that is thrown when metadata
related service requests fails.

ObjectNotFoundException

The exception that is thrown when an
object is not present.

OptimisticConcurrencyException

The exception that is thrown when an
optimistic concurrency violation occurs.

ProviderIncompatibleException

The exception that is thrown when the
underlying data provider is incompatible with the Entity Framework.

UpdateException

The exception that is thrown when
modifications to object instances cannot be persisted to the data store.

   

System.Data.Linq

 

ChangeConflictException

Thrown when an update fails because
database values have been updated since the client last read them.

DuplicateKeyException

Thrown when an attempt is made to add
an object to the identity cache by using a key that is already being used.

ForeignKeyReferenceAlreadyHasValueException

Represents errors that occur when an
attempt is made to change a foreign key when the entity is already loaded.

   

System.Data.Services

 

DataServiceException

Represents an instance of the System.Data.Services.DataServiceException
class with a specified message that describes the error.

   

System.Web

 

DatabaseNotEnabledForNotificationException

The exception that is thrown when a
SQL Server database is not enabled to support dependencies associated with
the System.Web.Caching.SqlCacheDependency class. This class cannot be
inherited.

HostingEnvironmentException

 

HttpCompileException

The exception that is thrown when a
compiler error occurs.

HttpException

Describes an exception that occurred
during the processing of HTTP requests.

HttpParseException

The exception that is thrown when a
parse error occurs.

HttpRequestValidationException

The exception that is thrown when a
potentially malicious input string is received from the client as part of the
request data. This class cannot be inherited.

HttpUnhandledException

The exception that is thrown when a
generic exception occurs.

MembershipCreateUserException

The exception that is thrown when a
user is not successfully created by a membership provider.

MembershipPasswordException

The exception that is thrown when a
password cannot be retrieved from the password store.

SqlExecutionException

Defines a class for SQL execution
exceptions in the System.Web.Management namespace.

TableNotEnabledForNotificationException

The exception that is thrown when a
System.Web.Caching.SqlCacheDependency class is used against a database table
that is not enabled for change notifications.

ViewStateException

Represents the exception that is
thrown when the view state cannot be loaded or validated. This class cannot
be inherited.

   

System.Web.Services

 

InvalidContentTypeException

 

InvalidDocumentContentsException

 

SoapException

Represents the exception that is
thrown when an XML Web service method is called over SOAP and an exception
occurs.

SoapHeaderException

The SOAP representation of a server
error.

   

System.Xml

 

UpaException

 

XmlException

Returns detailed information about
the last exception.

XmlSchemaException

Returns detailed information about
the schema exception.

XmlSchemaInferenceException

Returns information about errors
encountered by the System.Xml.Schema.XmlSchemaInference class while inferring
a schema from an XML document.

XmlSchemaValidationException

Represents the exception thrown when
XML Schema Definition Language (XSD) schema validation errors and warnings
are encountered in an XML document being validated.

XPathException

Provides the exception thrown when an
error occurs while processing an XPath expression.

XsltCompileException

The exception that is thrown by the
Load method when an error is found in the XSLT style sheet.

XsltException

The exception that is thrown when an
error occurs while processing an XSLT transformation.

 

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