Class EnumerableExtensions

Provides extension methods for the IEnumerable<T> interface.

Inheritance
Object
EnumerableExtensions
Namespace: Celestial.UIToolkit.Extensions
Assembly: Celestial.UIToolkit.Core.dll
Syntax
public static class EnumerableExtensions

Methods

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AddRange<T>(ICollection<T>, IEnumerable<T>)

Adds the specified sequence to the collection.

Declaration
public static void AddRange<T>(this ICollection<T> collection, IEnumerable<T> items)
Parameters
Type Name Description
ICollection<T> collection

The collection.
IEnumerable<T> items

The items to be added to the collection.
Type Parameters
Name Description
T

The type of elements in the collection.
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ElementAfter<T>(IEnumerable<T>, Int32)

Returns the element after the specified index.

Declaration
public static T ElementAfter<T>(this IEnumerable<T> enumerable, int index)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable.
Int32 index

The index which will be used to find the next element.
Returns
Type Description
T

The element after the element at the specified index.
Type Parameters
Name Description
T

The type of elements in the enumerable.
Exceptions
Type Condition
ArgumentNullException
ArgumentOutOfRangeException

Thrown if index is not in the enumerable's range, or if the element at the specified index is the last element in the sequence.
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ElementAfterOrDefault<T>(IEnumerable<T>, Int32)

Returns the element after the specified index or a default value, if the element at the specified index is the last element in the sequence.

Declaration
public static T ElementAfterOrDefault<T>(this IEnumerable<T> enumerable, int index)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable.
Int32 index

The index which will be used to find the next element.
Returns
Type Description
T

The element after the element at the specified index or a default value.
Type Parameters
Name Description
T

The type of elements in the enumerable.
Exceptions
Type Condition
ArgumentNullException
ArgumentOutOfRangeException

Thrown if index is not in the enumerable's range.
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ElementBefore<T>(IEnumerable<T>, Int32)

Returns the element which comes before the specified index.

Declaration
public static T ElementBefore<T>(this IEnumerable<T> enumerable, int index)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable.
Int32 index

The index which will be used to find the previous element.
Returns
Type Description
T

The element which comes before the element at the specified index.
Type Parameters
Name Description
T

The type of elements in the enumerable.
Exceptions
Type Condition
ArgumentNullException
ArgumentOutOfRangeException

Thrown if index is not in the enumerable's range, or if the element at the specified index is the first element in the sequence.
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ElementBeforeOrDefault<T>(IEnumerable<T>, Int32)

Returns the element which comes before the specified index or a default value, if the element at the specified index is the first element in the sequence.

Declaration
public static T ElementBeforeOrDefault<T>(this IEnumerable<T> enumerable, int index)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable.
Int32 index

The index which will be used to find the previous element.
Returns
Type Description
T

The element which comes before the element at the specified index or a default value.
Type Parameters
Name Description
T

The type of elements in the enumerable.
Exceptions
Type Condition
ArgumentNullException
ArgumentOutOfRangeException

Thrown if index is not in the enumerable's range.
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IndexOf<T>(IEnumerable<T>, T)

Returns the index of the specified value in the sequence.

Declaration
public static int IndexOf<T>(this IEnumerable<T> enumerable, T value)
Parameters
Type Name Description
IEnumerable<T> enumerable

The enumerable.
T value

The value to be found.
Returns
Type Description
Int32

The index of the found element; -1 if nothing was found.
Type Parameters
Name Description
T

The type of elements in the sequence.
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RemoveAll<T>(IList<T>, Func<T, Boolean>)

Removes all elements from the list (in place, the input list will be changed) which satisfy the given predicate.

Declaration
public static IList<T> RemoveAll<T>(this IList<T> list, Func<T, bool> predicate)
Parameters
Type Name Description
IList<T> list

The list.
Func<T, Boolean> predicate

A predicate to be fulfilled for an item to be removed.
Returns
Type Description
IList<T>

The same list instance.
Type Parameters
Name Description
T

The type of elements in the list.