CopyTo Method

ReadOnlyDictionary<TKey, TValue>.KeyCollection.CopyTo Method (TKey[], Int32)

.NET Framework 4.6 and 4.5

Copies the elements of the collection to an array, starting at a specific array index.

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

public void CopyTo(
	TKey[] array,
	int arrayIndex


Type: TKey[]

The one-dimensional array that is the destination of the elements copied from the collection. The array must have zero-based indexing.

Type: System.Int32

The zero-based index in array at which copying begins.

Exception Condition

array is null.


arrayIndex is less than 0.


array is multidimensional.


The number of elements in the source collection is greater than the available space from arrayIndex to the end of the destination array.


Type T cannot be cast automatically to the type of the destination array.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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