GetRange Method

List<'T>.GetRange Method (Int32, Int32)

 

Creates a shallow copy of a range of elements in the source List<'T>.

Namespace:   System.Collections.Generic
Assembly:  mscorlib (in mscorlib.dll)

member GetRange : 
        index:int *
        count:int -> List<'T>

Parameters

index
Type: System.Int32

The zero-based List<'T> index at which the range starts.

count
Type: System.Int32

The number of elements in the range.

Return Value

Type: System.Collections.Generic.List<'T>

A shallow copy of a range of elements in the source List<'T>.

Exception Condition
ArgumentOutOfRangeException

index is less than 0.

-or-

count is less than 0.

ArgumentException

index and count do not denote a valid range of elements in the List<'T>.

A shallow copy of a collection of reference types, or a subset of that collection, contains only the references to the elements of the collection. The objects themselves are not copied. The references in the new list point to the same objects as the references in the original list.

A shallow copy of a collection of value types, or a subset of that collection, contains the elements of the collection. However, if the elements of the collection contain references to other objects, those objects are not copied. The references in the elements of the new collection point to the same objects as the references in the elements of the original collection.

In contrast, a deep copy of a collection copies the elements and everything directly or indirectly referenced by the elements.

This method is an O(n) operation, where n is count.

The following example demonstrates the GetRange method and other methods of the List<'T> class that act on ranges. At the end of the example, the GetRange method is used to get three items from the list, beginning with index location 2. The ToArray method is called on the resulting List<'T>, creating an array of three elements. The elements of the array are displayed.

No code example is currently available or this language may not be supported.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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