Hashtable.GetHash(Object) Method

Definition

Namespace:: System.Collections

Assemblies:: System.Collections.NonGeneric.dll, mscorlib.dll, netstandard.dll, System.Runtime.Extensions.dll

Returns the hash code for the specified key.

protected:
 virtual int GetHash(System::Object ^ key);

protected virtual int GetHash (object key);

abstract member GetHash : obj -> int
override this.GetHash : obj -> int

Protected Overridable Function GetHash (key As Object) As Integer

Parameters

key: Object

The Object for which a hash code is to be returned.

Returns

Int32

The hash code for key.

Exceptions

NullReferenceException

key is null.

Remarks

If the hash table was created with a specific IHashCodeProvider implementation, this method uses that hash code provider; otherwise, it uses the Object.GetHashCode implementation of key.

This method is an O(1) operation.