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class System.Collections.Generic.CollectionExtensions
Assembly: System.Collections
Inheritance: object → CollectionExtensions
Provides extension methods for generic collections.
Methods
public static
void
AddRange(List<T> list,
ReadOnlySpan<T> source)
Adds the elements of the specified span to the end of the <see cref="T:System.Collections.Generic.List`1" /> .
list
The list to which the elements should be added.
source
The span whose elements should be added to the end of the <see cref="T:System.Collections.Generic.List`1" /> .
public static
void
CopyTo(List<T> list,
Span<T> destination)
Copies the entire <see cref="T:System.Collections.Generic.List`1" /> to a span.
list
The list from which the elements are copied.
destination
The span that is the destination of the elements copied from <paramref name="list" /> .
public static
TValue
GetValueOrDefault(IReadOnlyDictionary<TKey, TValue> dictionary,
TKey key)
Tries to get the value associated with the specified <paramref name="key" /> in the <paramref name="dictionary" /> .
Returns A <typeparamref name="TValue" /> instance. When the method is successful, the returned object is the value associated with the specified <paramref name="key" /> . When the method fails, it returns the <see langword="default" /> value for <typeparamref name="TValue" /> .
dictionary
A dictionary with keys of type <typeparamref name="TKey" /> and values of type <typeparamref name="TValue" /> .
key
The key of the value to get.
public static
TValue
GetValueOrDefault(IReadOnlyDictionary<TKey, TValue> dictionary,
TKey key,
TValue defaultValue)
Tries to get the value associated with the specified <paramref name="key" /> in the <paramref name="dictionary" /> .
Returns A <typeparamref name="TValue" /> instance. When the method is successful, the returned object is the value associated with the specified <paramref name="key" /> . When the method fails, it returns <paramref name="defaultValue" /> .
dictionary
A dictionary with keys of type <typeparamref name="TKey" /> and values of type <typeparamref name="TValue" /> .
key
The key of the value to get.
defaultValue
The default value to return when the <paramref name="dictionary" /> cannot find a value associated with the specified <paramref name="key" /> .
public static
void
InsertRange(List<T> list,
int index,
ReadOnlySpan<T> source)
Inserts the elements of a span into the <see cref="T:System.Collections.Generic.List`1" /> at the specified index.
list
The list into which the elements should be inserted.
index
The zero-based index at which the new elements should be inserted.
source
The span whose elements should be added to the <see cref="T:System.Collections.Generic.List`1" /> .
public static
bool
TryAdd(IDictionary<TKey, TValue> dictionary,
TKey key,
TValue value)
Tries to add the specified <paramref name="key" /> and <paramref name="value" /> to the <paramref name="dictionary" /> .
Returns <see langword="true" /> when the <paramref name="key" /> and <paramref name="value" /> are successfully added to the <paramref name="dictionary" /> ; <see langword="false" /> when the <paramref name="dictionary" /> already contains the specified <paramref name="key" /> , in which case nothing gets added.
dictionary
A dictionary with keys of type <typeparamref name="TKey" /> and values of type <typeparamref name="TValue" /> .
key
The key of the value to add.
value
The value to add.
public static
ObjectModel.ReadOnlyCollection<T>
AsReadOnly(IList<T> list)
Returns a read-only <see cref="T:System.Collections.ObjectModel.ReadOnlyCollection`1" /> wrapper for the specified list.
Returns An object that acts as a read-only wrapper around the current <see cref="T:System.Collections.Generic.IList`1" /> .
list
The list to wrap.
public static
ObjectModel.ReadOnlySet<T>
AsReadOnly(ISet<T> set)
<para>Returns a read-only <see cref="T:System.Collections.ObjectModel.ReadOnlySet`1" /> wrapper for the specified set.</para>
Returns An object that acts as a read-only wrapper around the current <see cref="T:System.Collections.Generic.ISet`1" /> .
set
The set to wrap.
public static
ObjectModel.ReadOnlyDictionary<TKey, TValue>
AsReadOnly(IDictionary<TKey, TValue> dictionary)
Returns a read-only <see cref="T:System.Collections.ObjectModel.ReadOnlyDictionary`2" /> wrapper for the current dictionary.
Returns An object that acts as a read-only wrapper around the current <see cref="T:System.Collections.Generic.IDictionary`2" /> .
dictionary
The dictionary to wrap.
public
bool
Equals(object obj)
Inherited from object
protected
void
Finalize()
Inherited from object
public
int
GetHashCode()
Inherited from object
protected
object
MemberwiseClone()
Inherited from object
public
string
ToString()
Inherited from object