Early Preview
This is currently very much a preview. Please feel free to try things out,
but don't be upset if anything is not yet working. Feedback is welcome over on our
GitHub Dicussions page.
class System.Collections.Hashtable
Assembly: System.Runtime
Inheritance: object → Hashtable
Represents a collection of key/value pairs that are organized based on the hash code of the key.
Properties
protected
IComparer
comparer
Gets or sets the <see cref="T:System.Collections.IComparer" /> to use for the <see cref="T:System.Collections.Hashtable" /> .
public
int
Count
Gets the number of key/value pairs contained in the <see cref="T:System.Collections.Hashtable" /> .
protected
IEqualityComparer
EqualityComparer
Gets the <see cref="T:System.Collections.IEqualityComparer" /> to use for the <see cref="T:System.Collections.Hashtable" /> .
protected
IHashCodeProvider
hcp
Gets or sets the object that can dispense hash codes.
public
bool
IsFixedSize
Gets a value indicating whether the <see cref="T:System.Collections.Hashtable" /> has a fixed size.
public
bool
IsReadOnly
Gets a value indicating whether the <see cref="T:System.Collections.Hashtable" /> is read-only.
public
bool
IsSynchronized
Gets a value indicating whether access to the <see cref="T:System.Collections.Hashtable" /> is synchronized (thread safe).
public
object
Item
public
ICollection
Keys
Gets an <see cref="T:System.Collections.ICollection" /> containing the keys in the <see cref="T:System.Collections.Hashtable" /> .
public
object
SyncRoot
Gets an object that can be used to synchronize access to the <see cref="T:System.Collections.Hashtable" /> .
public
ICollection
Values
Gets an <see cref="T:System.Collections.ICollection" /> containing the values in the <see cref="T:System.Collections.Hashtable" /> .
Methods
public
void
Add(object key,
object value)
key
The key of the element to add.
value
The value of the element to add. The value can be <see langword="null" /> .
Adds an element with the specified key and value into the <see cref="T:System.Collections.Hashtable" /> .
public
void
Clear()
Removes all elements from the <see cref="T:System.Collections.Hashtable" /> .
public
object
Clone() Returns A shallow copy of the <see cref="T:System.Collections.Hashtable" /> .
Creates a shallow copy of the <see cref="T:System.Collections.Hashtable" /> .
public
bool
Contains(object key)
key
The key to locate in the <see cref="T:System.Collections.Hashtable" /> .
Returns <see langword="true" /> if the <see cref="T:System.Collections.Hashtable" /> contains an element with the specified key; otherwise, <see langword="false" /> .
Determines whether the <see cref="T:System.Collections.Hashtable" /> contains a specific key.
public
bool
ContainsKey(object key)
key
The key to locate in the <see cref="T:System.Collections.Hashtable" /> .
Returns <see langword="true" /> if the <see cref="T:System.Collections.Hashtable" /> contains an element with the specified key; otherwise, <see langword="false" /> .
Determines whether the <see cref="T:System.Collections.Hashtable" /> contains a specific key.
public
bool
ContainsValue(object value)
value
The value to locate in the <see cref="T:System.Collections.Hashtable" /> . The value can be <see langword="null" /> .
Returns <see langword="true" /> if the <see cref="T:System.Collections.Hashtable" /> contains an element with the specified <paramref name="value" /> ; otherwise, <see langword="false" /> .
Determines whether the <see cref="T:System.Collections.Hashtable" /> contains a specific value.
public
void
CopyTo(Array array,
int arrayIndex)
array
The one-dimensional <see cref="T:System.Array" /> that is the destination of the <see cref="T:System.Collections.DictionaryEntry" /> objects copied from <see cref="T:System.Collections.Hashtable" /> . The <see cref="T:System.Array" /> must have zero-based indexing.
arrayIndex
The zero-based index in <paramref name="array" /> at which copying begins.
Copies the <see cref="T:System.Collections.Hashtable" /> elements to a one-dimensional <see cref="T:System.Array" /> instance at the specified index.
public
IDictionaryEnumerator
GetEnumerator() Returns An <see cref="T:System.Collections.IDictionaryEnumerator" /> for the <see cref="T:System.Collections.Hashtable" /> .
Returns an <see cref="T:System.Collections.IDictionaryEnumerator" /> that iterates through the <see cref="T:System.Collections.Hashtable" /> .
protected
int
GetHash(object key)
key
The <see cref="T:System.Object" /> for which a hash code is to be returned.
Returns The hash code for <paramref name="key" /> .
Returns the hash code for the specified key.
public
void
GetObjectData(Runtime.Serialization.SerializationInfo info,
Runtime.Serialization.StreamingContext context)
info
A <see cref="T:System.Runtime.Serialization.SerializationInfo" /> object containing the information required to serialize the <see cref="T:System.Collections.Hashtable" /> .
context
A <see cref="T:System.Runtime.Serialization.StreamingContext" /> object containing the source and destination of the serialized stream associated with the <see cref="T:System.Collections.Hashtable" /> .
Implements the <see cref="T:System.Runtime.Serialization.ISerializable" /> interface and returns the data needed to serialize the <see cref="T:System.Collections.Hashtable" /> .
protected
bool
KeyEquals(object item,
object key)
item
The <see cref="T:System.Object" /> to compare with <paramref name="key" /> .
key
The key in the <see cref="T:System.Collections.Hashtable" /> to compare with <paramref name="item" /> .
Returns <see langword="true" /> if <paramref name="item" /> and <paramref name="key" /> are equal; otherwise, <see langword="false" /> .
Compares a specific <see cref="T:System.Object" /> with a specific key in the <see cref="T:System.Collections.Hashtable" /> .
public
void
OnDeserialization(object sender)
sender
The source of the deserialization event.
Implements the <see cref="T:System.Runtime.Serialization.ISerializable" /> interface and raises the deserialization event when the deserialization is complete.
public
void
Remove(object key)
key
The key of the element to remove.
Removes the element with the specified key from the <see cref="T:System.Collections.Hashtable" /> .
public
bool
Equals(object obj)
Inherited from object
obj
The object to compare with the current object.
Returns <see langword="true" /> if the specified object is equal to the current object; otherwise, <see langword="false" /> .
Determines whether the specified object is equal to the current object.
protected
void
Finalize()
Inherited from object
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
public
int
GetHashCode()
Inherited from object
Returns A hash code for the current object.
Serves as the default hash function.
public
Type
GetType()
Inherited from object
Returns The exact runtime type of the current instance.
Gets the <see cref="T:System.Type" /> of the current instance.
protected
object
MemberwiseClone()
Inherited from object
Returns A shallow copy of the current <see cref="T:System.Object" /> .
Creates a shallow copy of the current <see cref="T:System.Object" /> .
public
string
ToString()
Inherited from object
Returns A string that represents the current object.
Returns a string that represents the current object.