KeyNotFoundException Class
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
The exception that is thrown when the key specified for accessing an element in a collection does not match any key in the collection.
System::Object
System::Exception
System::SystemException
System.Collections.Generic::KeyNotFoundException
System::Exception
System::SystemException
System.Collections.Generic::KeyNotFoundException
Assembly: mscorlib (in mscorlib.dll)
The KeyNotFoundException type exposes the following members.
| Name | Description | |
|---|---|---|
 | KeyNotFoundException() | Initializes a new instance of the KeyNotFoundException class using default property values. |
| 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. |
| Name | Description | |
|---|---|---|
 | 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 frames on the call stack at the time the current exception was thrown. (Inherited from Exception.) |
| Name | Description | |
|---|---|---|
| Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (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 a hash function for a particular type. (Inherited from Object.) |
| 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.) |
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.
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