KeyNotFoundException Class

Definition

Namespace:: System.Collections.Generic

Assemblies:: System.Runtime.dll, mscorlib.dll, netstandard.dll

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

public ref class KeyNotFoundException : SystemException

[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public class KeyNotFoundException : SystemException

type KeyNotFoundException = class
    inherit SystemException
    interface ISerializable

Public Class KeyNotFoundException
Inherits SystemException

Inheritance: Object

Exception

SystemException
KeyNotFoundException

Attributes: ComVisibleAttribute SerializableAttribute

Implements: ISerializable

Remarks

A KeyNotFoundException is thrown when an operation attempts to retrieve an element from a collection using a key that does not exist in that collection.

KeyNotFoundException uses the HRESULT COR_E_KEYNOTFOUND, which has the value 0x80131577.

For a list of initial property values for an instance of the KeyNotFoundException class, see the KeyNotFoundException constructors.

Constructors

KeyNotFoundException()	Initializes a new instance of the KeyNotFoundException class using default property values.
KeyNotFoundException(SerializationInfo, StreamingContext)	Initializes a new instance of the KeyNotFoundException class with serialized data.
KeyNotFoundException(String)	Initializes a new instance of the KeyNotFoundException class with the specified error message.
KeyNotFoundException(String, Exception)	Initializes a new instance of the KeyNotFoundException class with the specified error message and a reference to the inner exception that is the cause of this exception.

Properties

Data	Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception)
HelpLink	Gets or sets a link to the help file associated with this exception. (Inherited from Exception)
HResult	Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception)
InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception)
Message	Gets a message that describes the current exception. (Inherited from Exception)
Source	Gets or sets the name of the application or the object that causes the error. (Inherited from Exception)
StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception)
TargetSite	Gets the method that throws the current exception. (Inherited from Exception)

Methods

Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetBaseException()	When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetObjectData(SerializationInfo, StreamingContext)	When overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception)
GetType()	Gets the runtime type of the current instance. (Inherited from Exception)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Creates and returns a string representation of the current exception. (Inherited from Exception)

Events

SerializeObjectState

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(Inherited from Exception)