# FreezableCollection(Of T) Class

**Visual Studio 2010**

Represents a collection of DependencyObject, Freezable, or Animatable objects. FreezableCollection(Of T) is itself an Animatable type.

**Namespace:**System.Windows

**Assembly:**PresentationCore (in PresentationCore.dll)

**XMLNS for XAML:**http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

'Declaration Public Class FreezableCollection(Of T As DependencyObject) _ Inherits Animatable _ Implements IList, ICollection, IList(Of T), _ ICollection(Of T), IEnumerable(Of T), IEnumerable, INotifyCollectionChanged, _ INotifyPropertyChanged

See Remarks.

#### Type Parameters

- T
The type of collection. This type must be a DependencyObject or a derived class.

The FreezableCollection(Of T) type exposes the following members.

Name | Description | |
---|---|---|

FreezableCollection(Of T) | Initializes a new instance of FreezableCollection(Of T) that is empty and has the default initial capacity. | |

FreezableCollection(Of T)(IEnumerable(Of T)) | Initializes a new instance of the FreezableCollection(Of T) class that contains the same elements as the specified collection. | |

FreezableCollection(Of T)(Int32) | Initializes a new instance of the FreezableCollection(Of T) that is empty and has the specified initial capacity. |

Name | Description | |
---|---|---|

CanFreeze | Gets a value that indicates whether the object can be made unmodifiable. (Inherited from Freezable.) | |

Count | Gets the number of elements contained by this FreezableCollection(Of T). | |

DependencyObjectType | Gets the DependencyObjectType that wraps the CLR type of this instance. (Inherited from DependencyObject.) | |

Dispatcher | Gets the Dispatcher this DispatcherObject is associated with. (Inherited from DispatcherObject.) | |

HasAnimatedProperties | Gets a value that indicates whether one or more AnimationClock objects is associated with any of this object's dependency properties. (Inherited from Animatable.) | |

IsFrozen | Gets a value that indicates whether the object is currently modifiable. (Inherited from Freezable.) | |

IsSealed | Gets a value that indicates whether this instance is currently sealed (read-only). (Inherited from DependencyObject.) | |

Item | Gets or sets the element at the specified index. |

Name | Description | |
---|---|---|

Add | Adds the specified object to the end of the FreezableCollection(Of T). | |

ApplyAnimationClock(DependencyProperty, AnimationClock) | Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable.) | |

ApplyAnimationClock(DependencyProperty, AnimationClock, HandoffBehavior) | Applies an AnimationClock to the specified DependencyProperty. If the property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable.) | |

BeginAnimation(DependencyProperty, AnimationTimeline) | Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the SnapshotAndReplace handoff behavior is used. (Inherited from Animatable.) | |

BeginAnimation(DependencyProperty, AnimationTimeline, HandoffBehavior) | Applies an animation to the specified DependencyProperty. The animation is started when the next frame is rendered. If the specified property is already animated, the specified HandoffBehavior is used. (Inherited from Animatable.) | |

CheckAccess | Determines whether the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) | |

Clear | Removes all elements from the collection. | |

ClearValue(DependencyProperty) | Clears the local value of a property. The property to be cleared is specified by a DependencyProperty identifier. (Inherited from DependencyObject.) | |

ClearValue(DependencyPropertyKey) | Clears the local value of a read-only property. The property to be cleared is specified by a DependencyPropertyKey. (Inherited from DependencyObject.) | |

Clone | Creates a modifiable clone of this FreezableCollection(Of T) and its contents, making deep copies. If this collection (or its contents) has animated dependency properties, the property’s base value is copied, not its current animated value. | |

CloneCore | Makes this instance a clone (deep copy) of the specified FreezableCollection(Of T) using base (non-animated) property values. (Overrides Freezable.CloneCore(Freezable).) | |

CloneCurrentValue | Creates a modifiable copy of this FreezableCollection(Of T) and its contents, making deep copies of this object's current values. If this object (or the objects it contains) contains animated dependency properties, their current animated values are copied. | |

CloneCurrentValueCore | Makes this instance a modifiable clone (deep copy) of the specified FreezableCollection(Of T) using current property values. (Overrides Freezable.CloneCurrentValueCore(Freezable).) | |

CoerceValue | Coerces the value of the specified dependency property. This is accomplished by invoking any CoerceValueCallback function specified in property metadata for the dependency property as it exists on the calling DependencyObject. (Inherited from DependencyObject.) | |

Contains | Determines whether this FreezableCollection(Of T) contains the specified value. | |

CopyTo | Copies the entire FreezableCollection(Of T) to a compatible one-dimensional array, starting at the specified index of the target array. | |

CreateInstance | Initializes a new instance of the Freezable class. (Inherited from Freezable.) | |

CreateInstanceCore | Creates a new instance of the FreezableCollection(Of T). (Overrides Freezable.CreateInstanceCore.) | |

Equals | Determines whether a provided DependencyObject is equivalent to the current DependencyObject. (Inherited from DependencyObject.) | |

Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |

Freeze | Makes the current object unmodifiable and sets its IsFrozen property to true. (Inherited from Freezable.) | |

FreezeCore | Makes this FreezableCollection(Of T) object unmodifiable or determines whether it can be made unmodifiable. (Overrides Animatable.FreezeCore(Boolean).) | |

GetAnimationBaseValue | Returns the non-animated value of the specified DependencyProperty. (Inherited from Animatable.) | |

GetAsFrozen | Creates a frozen copy of the Freezable, using base (non-animated) property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.) | |

GetAsFrozenCore | Makes this instance a frozen clone of the specified FreezableCollection(Of T) using base (non-animated) property values. (Overrides Freezable.GetAsFrozenCore(Freezable).) | |

GetCurrentValueAsFrozen | Creates a frozen copy of the Freezable using current property values. Because the copy is frozen, any frozen sub-objects are copied by reference. (Inherited from Freezable.) | |

GetCurrentValueAsFrozenCore | Makes this instance a frozen clone of the specified Freezable. If this object has animated dependency properties, their current animated values are copied. (Overrides Freezable.GetCurrentValueAsFrozenCore(Freezable).) | |

GetEnumerator | Returns an enumerator for the entire FreezableCollection(Of T). | |

GetHashCode | Gets a hash code for this DependencyObject. (Inherited from DependencyObject.) | |

GetLocalValueEnumerator | Creates a specialized enumerator for determining which dependency properties have locally set values on this DependencyObject. (Inherited from DependencyObject.) | |

GetType | Gets the Type of the current instance. (Inherited from Object.) | |

GetValue | Returns the current effective value of a dependency property on this instance of a DependencyObject. (Inherited from DependencyObject.) | |

IndexOf | Searches for the specified object and returns the zero-based index of the first occurrence within the entire FreezableCollection(Of T). | |

Insert | Inserts the specified object into the FreezableCollection(Of T) at the specified index. | |

InvalidateProperty | Re-evaluates the effective value for the specified dependency property (Inherited from DependencyObject.) | |

MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |

OnChanged | Called when the current Freezable object is modified. (Inherited from Freezable.) | |

OnFreezablePropertyChanged(DependencyObject, DependencyObject) | Ensures that appropriate context pointers are established for a DependencyObjectType data member that has just been set. (Inherited from Freezable.) | |

OnFreezablePropertyChanged(DependencyObject, DependencyObject, DependencyProperty) | This member supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code. (Inherited from Freezable.) | |

OnPropertyChanged | Overrides the DependencyObject implementation of OnPropertyChanged to also invoke any Changed handlers in response to a changing dependency property of type Freezable. (Inherited from Freezable.) | |

ReadLocalValue | Returns the local value of a dependency property, if it exists. (Inherited from DependencyObject.) | |

ReadPreamble | Ensures that the Freezable is being accessed from a valid thread. Inheritors of Freezable must call this method at the beginning of any API that reads data members that are not dependency properties. (Inherited from Freezable.) | |

Remove | Removes the first occurrence of the specified object from the FreezableCollection(Of T). | |

RemoveAt | Removes the object at the specified zero-based index of the FreezableCollection(Of T). | |

SetCurrentValue | Sets the value of a dependency property without changing its value source. (Inherited from DependencyObject.) | |

SetValue(DependencyProperty, Object) | Sets the local value of a dependency property, specified by its dependency property identifier. (Inherited from DependencyObject.) | |

SetValue(DependencyPropertyKey, Object) | Sets the local value of a read-only dependency property, specified by the DependencyPropertyKey identifier of the dependency property. (Inherited from DependencyObject.) | |

ShouldSerializeProperty | Returns a value that indicates whether serialization processes should serialize the value for the provided dependency property. (Inherited from DependencyObject.) | |

ToString | Returns a string that represents the current object. (Inherited from Object.) | |

VerifyAccess | Enforces that the calling thread has access to this DispatcherObject. (Inherited from DispatcherObject.) | |

WritePostscript | Raises the Changed event for the Freezable and invokes its OnChanged method. Classes that derive from Freezable should call this method at the end of any API that modifies class members that are not stored as dependency properties. (Inherited from Freezable.) | |

WritePreamble | Verifies that the Freezable is not frozen and that it is being accessed from a valid threading context. Freezable inheritors should call this method at the beginning of any API that writes to data members that are not dependency properties. (Inherited from Freezable.) |

Name | Description | |
---|---|---|

Aggregate(Of T)(Func(Of T, T, T)) | Overloaded. Applies an accumulator function over a sequence. (Defined by Enumerable.) | |

Aggregate(Of T, TAccumulate)(TAccumulate, Func(Of TAccumulate, T, TAccumulate)) | Overloaded. Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. (Defined by Enumerable.) | |

Aggregate(Of T, TAccumulate, TResult)(TAccumulate, Func(Of TAccumulate, T, TAccumulate), Func(Of TAccumulate, TResult)) | Overloaded. Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. (Defined by Enumerable.) | |

All(Of T) | Determines whether all elements of a sequence satisfy a condition. (Defined by Enumerable.) | |

Any(Of T) | Overloaded. Determines whether a sequence contains any elements. (Defined by Enumerable.) | |

Any(Of T)(Func(Of T, Boolean)) | Overloaded. Determines whether any element of a sequence satisfies a condition. (Defined by Enumerable.) | |

AsEnumerable(Of T) | Returns the input typed as IEnumerable(Of T). (Defined by Enumerable.) | |

AsParallel | Overloaded. Enables parallelization of a query. (Defined by ParallelEnumerable.) | |

AsParallel(Of T) | Overloaded. Enables parallelization of a query. (Defined by ParallelEnumerable.) | |

AsQueryable | Overloaded. Converts an IEnumerable to an IQueryable. (Defined by Queryable.) | |

AsQueryable(Of T) | Overloaded. Converts a generic IEnumerable(Of T) to a generic IQueryable(Of T). (Defined by Queryable.) | |

Average(Of T)(Func(Of T, Decimal)) | Overloaded. Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Nullable(Of Decimal))) | Overloaded. Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Double)) | Overloaded. Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Nullable(Of Double))) | Overloaded. Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Int32)) | Overloaded. Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Nullable(Of Int32))) | Overloaded. Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Int64)) | Overloaded. Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Nullable(Of Int64))) | Overloaded. Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Single)) | Overloaded. Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Average(Of T)(Func(Of T, Nullable(Of Single))) | Overloaded. Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Cast(Of TResult) | Casts the elements of an IEnumerable to the specified type. (Defined by Enumerable.) | |

Concat(Of T) | Concatenates two sequences. (Defined by Enumerable.) | |

Contains(Of T)(T) | Overloaded. Determines whether a sequence contains a specified element by using the default equality comparer. (Defined by Enumerable.) | |

Contains(Of T)(T, IEqualityComparer(Of T)) | Overloaded. Determines whether a sequence contains a specified element by using a specified IEqualityComparer(Of T). (Defined by Enumerable.) | |

Count(Of T) | Overloaded. Returns the number of elements in a sequence. (Defined by Enumerable.) | |

Count(Of T)(Func(Of T, Boolean)) | Overloaded. Returns a number that represents how many elements in the specified sequence satisfy a condition. (Defined by Enumerable.) | |

DefaultIfEmpty(Of T) | Overloaded. Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty. (Defined by Enumerable.) | |

DefaultIfEmpty(Of T)(T) | Overloaded. Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. (Defined by Enumerable.) | |

Distinct(Of T) | Overloaded. Returns distinct elements from a sequence by using the default equality comparer to compare values. (Defined by Enumerable.) | |

Distinct(Of T)(IEqualityComparer(Of T)) | Overloaded. Returns distinct elements from a sequence by using a specified IEqualityComparer(Of T) to compare values. (Defined by Enumerable.) | |

ElementAt(Of T) | Returns the element at a specified index in a sequence. (Defined by Enumerable.) | |

ElementAtOrDefault(Of T) | Returns the element at a specified index in a sequence or a default value if the index is out of range. (Defined by Enumerable.) | |

Except(Of T)(IEnumerable(Of T)) | Overloaded. Produces the set difference of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.) | |

Except(Of T)(IEnumerable(Of T), IEqualityComparer(Of T)) | Overloaded. Produces the set difference of two sequences by using the specified IEqualityComparer(Of T) to compare values. (Defined by Enumerable.) | |

First(Of T) | Overloaded. Returns the first element of a sequence. (Defined by Enumerable.) | |

First(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the first element in a sequence that satisfies a specified condition. (Defined by Enumerable.) | |

FirstOrDefault(Of T) | Overloaded. Returns the first element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.) | |

FirstOrDefault(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. (Defined by Enumerable.) | |

GroupBy(Of T, TKey)(Func(Of T, TKey)) | Overloaded. Groups the elements of a sequence according to a specified key selector function. (Defined by Enumerable.) | |

GroupBy(Of T, TKey)(Func(Of T, TKey), IEqualityComparer(Of TKey)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TResult)(Func(Of T, TKey), Func(Of TKey, IEnumerable(Of T), TResult)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement), IEqualityComparer(Of TKey)) | Overloaded. Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TResult)(Func(Of T, TKey), Func(Of TKey, IEnumerable(Of T), TResult), IEqualityComparer(Of TKey)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TElement, TResult)(Func(Of T, TKey), Func(Of T, TElement), Func(Of TKey, IEnumerable(Of TElement), TResult)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function. (Defined by Enumerable.) | |

GroupBy(Of T, TKey, TElement, TResult)(Func(Of T, TKey), Func(Of T, TElement), Func(Of TKey, IEnumerable(Of TElement), TResult), IEqualityComparer(Of TKey)) | Overloaded. Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. (Defined by Enumerable.) | |

GroupJoin(Of T, TInner, TKey, TResult)(IEnumerable(Of TInner), Func(Of T, TKey), Func(Of TInner, TKey), Func(Of T, IEnumerable(Of TInner), TResult)) | Overloaded. Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. (Defined by Enumerable.) | |

GroupJoin(Of T, TInner, TKey, TResult)(IEnumerable(Of TInner), Func(Of T, TKey), Func(Of TInner, TKey), Func(Of T, IEnumerable(Of TInner), TResult), IEqualityComparer(Of TKey)) | Overloaded. Correlates the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer(Of T) is used to compare keys. (Defined by Enumerable.) | |

Intersect(Of T)(IEnumerable(Of T)) | Overloaded. Produces the set intersection of two sequences by using the default equality comparer to compare values. (Defined by Enumerable.) | |

Intersect(Of T)(IEnumerable(Of T), IEqualityComparer(Of T)) | Overloaded. Produces the set intersection of two sequences by using the specified IEqualityComparer(Of T) to compare values. (Defined by Enumerable.) | |

Join(Of T, TInner, TKey, TResult)(IEnumerable(Of TInner), Func(Of T, TKey), Func(Of TInner, TKey), Func(Of T, TInner, TResult)) | Overloaded. Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys. (Defined by Enumerable.) | |

Join(Of T, TInner, TKey, TResult)(IEnumerable(Of TInner), Func(Of T, TKey), Func(Of TInner, TKey), Func(Of T, TInner, TResult), IEqualityComparer(Of TKey)) | Overloaded. Correlates the elements of two sequences based on matching keys. A specified IEqualityComparer(Of T) is used to compare keys. (Defined by Enumerable.) | |

Last(Of T) | Overloaded. Returns the last element of a sequence. (Defined by Enumerable.) | |

Last(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the last element of a sequence that satisfies a specified condition. (Defined by Enumerable.) | |

LastOrDefault(Of T) | Overloaded. Returns the last element of a sequence, or a default value if the sequence contains no elements. (Defined by Enumerable.) | |

LastOrDefault(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. (Defined by Enumerable.) | |

LongCount(Of T) | Overloaded. Returns an Int64 that represents the total number of elements in a sequence. (Defined by Enumerable.) | |

LongCount(Of T)(Func(Of T, Boolean)) | Overloaded. Returns an Int64 that represents how many elements in a sequence satisfy a condition. (Defined by Enumerable.) | |

Max(Of T) | Overloaded. Returns the maximum value in a generic sequence. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Decimal)) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Decimal value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Nullable(Of Decimal))) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Double)) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Double value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Nullable(Of Double))) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Int32)) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int32 value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Nullable(Of Int32))) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Int64)) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Int64 value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Nullable(Of Int64))) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Single)) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum Single value. (Defined by Enumerable.) | |

Max(Of T)(Func(Of T, Nullable(Of Single))) | Overloaded. Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. (Defined by Enumerable.) | |

Max(Of T, TResult)(Func(Of T, TResult)) | Overloaded. Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. (Defined by Enumerable.) | |

Min(Of T) | Overloaded. Returns the minimum value in a generic sequence. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Decimal)) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Decimal value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Nullable(Of Decimal))) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Double)) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Double value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Nullable(Of Double))) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Int32)) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int32 value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Nullable(Of Int32))) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Int64)) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Int64 value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Nullable(Of Int64))) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Single)) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum Single value. (Defined by Enumerable.) | |

Min(Of T)(Func(Of T, Nullable(Of Single))) | Overloaded. Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. (Defined by Enumerable.) | |

Min(Of T, TResult)(Func(Of T, TResult)) | Overloaded. Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. (Defined by Enumerable.) | |

OfType(Of TResult) | Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.) | |

OrderBy(Of T, TKey)(Func(Of T, TKey)) | Overloaded. Sorts the elements of a sequence in ascending order according to a key. (Defined by Enumerable.) | |

OrderBy(Of T, TKey)(Func(Of T, TKey), IComparer(Of TKey)) | Overloaded. Sorts the elements of a sequence in ascending order by using a specified comparer. (Defined by Enumerable.) | |

OrderByDescending(Of T, TKey)(Func(Of T, TKey)) | Overloaded. Sorts the elements of a sequence in descending order according to a key. (Defined by Enumerable.) | |

OrderByDescending(Of T, TKey)(Func(Of T, TKey), IComparer(Of TKey)) | Overloaded. Sorts the elements of a sequence in descending order by using a specified comparer. (Defined by Enumerable.) | |

Reverse(Of T) | Inverts the order of the elements in a sequence. (Defined by Enumerable.) | |

Select(Of T, TResult)(Func(Of T, TResult)) | Overloaded. Projects each element of a sequence into a new form. (Defined by Enumerable.) | |

Select(Of T, TResult)(Func(Of T, Int32, TResult)) | Overloaded. Projects each element of a sequence into a new form by incorporating the element's index. (Defined by Enumerable.) | |

SelectMany(Of T, TResult)(Func(Of T, IEnumerable(Of TResult))) | Overloaded. Projects each element of a sequence to an IEnumerable(Of T) and flattens the resulting sequences into one sequence. (Defined by Enumerable.) | |

SelectMany(Of T, TResult)(Func(Of T, Int32, IEnumerable(Of TResult))) | Overloaded. Projects each element of a sequence to an IEnumerable(Of T), and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element. (Defined by Enumerable.) | |

SelectMany(Of T, TCollection, TResult)(Func(Of T, Int32, IEnumerable(Of TCollection)), Func(Of T, TCollection, TResult)) | Overloaded. Projects each element of a sequence to an IEnumerable(Of T), flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element. (Defined by Enumerable.) | |

SelectMany(Of T, TCollection, TResult)(Func(Of T, IEnumerable(Of TCollection)), Func(Of T, TCollection, TResult)) | Overloaded. Projects each element of a sequence to an IEnumerable(Of T), flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. (Defined by Enumerable.) | |

SequenceEqual(Of T)(IEnumerable(Of T)) | Overloaded. Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. (Defined by Enumerable.) | |

SequenceEqual(Of T)(IEnumerable(Of T), IEqualityComparer(Of T)) | Overloaded. Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer(Of T). (Defined by Enumerable.) | |

Single(Of T) | Overloaded. Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence. (Defined by Enumerable.) | |

Single(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists. (Defined by Enumerable.) | |

SingleOrDefault(Of T) | Overloaded. Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. (Defined by Enumerable.) | |

SingleOrDefault(Of T)(Func(Of T, Boolean)) | Overloaded. Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. (Defined by Enumerable.) | |

Skip(Of T) | Bypasses a specified number of elements in a sequence and then returns the remaining elements. (Defined by Enumerable.) | |

SkipWhile(Of T)(Func(Of T, Boolean)) | Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. (Defined by Enumerable.) | |

SkipWhile(Of T)(Func(Of T, Int32, Boolean)) | Overloaded. Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Decimal)) | Overloaded. Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Nullable(Of Decimal))) | Overloaded. Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Double)) | Overloaded. Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Nullable(Of Double))) | Overloaded. Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Int32)) | Overloaded. Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Nullable(Of Int32))) | Overloaded. Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Int64)) | Overloaded. Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Nullable(Of Int64))) | Overloaded. Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Single)) | Overloaded. Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Sum(Of T)(Func(Of T, Nullable(Of Single))) | Overloaded. Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. (Defined by Enumerable.) | |

Take(Of T) | Returns a specified number of contiguous elements from the start of a sequence. (Defined by Enumerable.) | |

TakeWhile(Of T)(Func(Of T, Boolean)) | Overloaded. Returns elements from a sequence as long as a specified condition is true. (Defined by Enumerable.) | |

TakeWhile(Of T)(Func(Of T, Int32, Boolean)) | Overloaded. Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function. (Defined by Enumerable.) | |

ToArray(Of T) | Creates an array from a IEnumerable(Of T). (Defined by Enumerable.) | |

ToDictionary(Of T, TKey)(Func(Of T, TKey)) | Overloaded. Creates a Dictionary(Of TKey, TValue) from an IEnumerable(Of T) according to a specified key selector function. (Defined by Enumerable.) | |

ToDictionary(Of T, TKey)(Func(Of T, TKey), IEqualityComparer(Of TKey)) | Overloaded. Creates a Dictionary(Of TKey, TValue) from an IEnumerable(Of T) according to a specified key selector function and key comparer. (Defined by Enumerable.) | |

ToDictionary(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement)) | Overloaded. Creates a Dictionary(Of TKey, TValue) from an IEnumerable(Of T) according to specified key selector and element selector functions. (Defined by Enumerable.) | |

ToDictionary(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement), IEqualityComparer(Of TKey)) | Overloaded. Creates a Dictionary(Of TKey, TValue) from an IEnumerable(Of T) according to a specified key selector function, a comparer, and an element selector function. (Defined by Enumerable.) | |

ToList(Of T) | Creates a List(Of T) from an IEnumerable(Of T). (Defined by Enumerable.) | |

ToLookup(Of T, TKey)(Func(Of T, TKey)) | Overloaded. Creates a Lookup(Of TKey, TElement) from an IEnumerable(Of T) according to a specified key selector function. (Defined by Enumerable.) | |

ToLookup(Of T, TKey)(Func(Of T, TKey), IEqualityComparer(Of TKey)) | Overloaded. Creates a Lookup(Of TKey, TElement) from an IEnumerable(Of T) according to a specified key selector function and key comparer. (Defined by Enumerable.) | |

ToLookup(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement)) | Overloaded. Creates a Lookup(Of TKey, TElement) from an IEnumerable(Of T) according to specified key selector and element selector functions. (Defined by Enumerable.) | |

ToLookup(Of T, TKey, TElement)(Func(Of T, TKey), Func(Of T, TElement), IEqualityComparer(Of TKey)) | Overloaded. Creates a Lookup(Of TKey, TElement) from an IEnumerable(Of T) according to a specified key selector function, a comparer and an element selector function. (Defined by Enumerable.) | |

Union(Of T)(IEnumerable(Of T)) | Overloaded. Produces the set union of two sequences by using the default equality comparer. (Defined by Enumerable.) | |

Union(Of T)(IEnumerable(Of T), IEqualityComparer(Of T)) | Overloaded. Produces the set union of two sequences by using a specified IEqualityComparer(Of T). (Defined by Enumerable.) | |

Where(Of T)(Func(Of T, Boolean)) | Overloaded. Filters a sequence of values based on a predicate. (Defined by Enumerable.) | |

Where(Of T)(Func(Of T, Int32, Boolean)) | Overloaded. Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. (Defined by Enumerable.) | |

Zip(Of T, TSecond, TResult) | Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results. (Defined by Enumerable.) |

Name | Description | |
---|---|---|

ICollection.CopyTo | Infrastructure. For a description of this member, see ICollection.CopyTo. | |

ICollection(Of T).IsReadOnly | Infrastructure. For a description of this member, see ICollection(Of T).IsReadOnly. | |

ICollection.IsSynchronized | Infrastructure. For a description of this member, see ICollection.IsSynchronized. | |

ICollection.SyncRoot | Infrastructure. For a description of this member, see ICollection.SyncRoot. | |

IEnumerable(Of T).GetEnumerator | Infrastructure. For a description of this member, see IEnumerable(Of T).GetEnumerator. | |

IEnumerable.GetEnumerator | Infrastructure. For a description of this member, see IEnumerable.GetEnumerator. | |

IList.Add | Infrastructure. For a description of this member, see IList.Add. | |

IList.Contains | Infrastructure. For a description of this member, see IList.Contains. | |

IList.IndexOf | Infrastructure. For a description of this member, see IList.IndexOf. | |

IList.Insert | Infrastructure. For a description of this member, see IList.Insert. | |

IList.IsFixedSize | Infrastructure. For a description of this member, see IList.IsFixedSize. | |

IList.IsReadOnly | Infrastructure. For a description of this member, see IList.IsReadOnly. | |

IList.Item | Infrastructure. For a description of this member, see IList.Item. | |

IList.Remove | Infrastructure. For a description of this member, see IList.Remove. | |

INotifyCollectionChanged.CollectionChanged | For a description of this member, see CollectionChanged. | |

INotifyPropertyChanged.PropertyChanged | For a description of this member, see PropertyChanged. |

This class is provided to enable the creation of custom collection types that fully support data binding, change notification, property invalidation, and animation of its contents.

#### XAML Usage for FreezableCollection

FreezableCollection(Of T) supports a limited XAML syntax.

As an object element at the root, you can theoretically specify an unconstrained FreezableCollection(Of T) object element, which must also specify the x:TypeArguments Directive to declare the constraint. However, this is not a common scenario, because to do this, the FreezableCollection(Of T) must be the root element. This limitation exists because the XAML processor implementation in WPF can only support x:TypeArguments Directive when the element it is being set on is the root element, and you must use x:TypeArguments on any open constraint generic if you want to instantiate a generic type in XAML. It is unlikely that you want a FreezableCollection(Of T) as the root element, even as loose XAML.

If you derive from FreezableCollection(Of T) and apply a type constraint in the derived collection, the derived collection can support a variety of usages. This is possible because the constraint in your derivation eliminates the need to pass x:TypeArguments.

The typical XAML usage for such a derived collection is through implicit collection syntax. Collections that support certain interfaces do not need to specify the collection itself as an object element. For details on collection syntax in XAML, see XAML Syntax In Detail. For instance, an object with a property where the property was of type FreezableCollection(Of T) constrained by DependencyObject could support the following syntax:

<object> <object.property> oneOrMoreDependencyObjectElements </object.property> </object>

As long as you do not hide the default constructor, the derived collection can also support an object element syntax (where the object element is explicit, as opposed to the implicit usage shown above). It does not need to be the root element. Or, you can also use the derived collection as a root element, without needing to specify x:TypeArguments, although using a collection as a root element is uncommon.

Any child elements of the collection in either of the above scenarios must be of the type of either the implemented constraint, or as specified by x:TypeArguments.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.