Dictionary(TKey, TValue) Constructor (IDictionary(TKey, TValue))

Dictionary<TKey, TValue> Constructor (IDictionary<TKey, TValue>)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Initializes a new instance of the Dictionary<TKey, TValue> class that contains elements copied from the specified IDictionary<TKey, TValue> and uses the default equality comparer for the key type.

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

public Dictionary(
	IDictionary<TKey, TValue> dictionary
)

Parameters

dictionary
Type: System.Collections.Generic.IDictionary<TKey, TValue>
The IDictionary<TKey, TValue> whose elements are copied to the new Dictionary<TKey, TValue>.

ExceptionCondition
ArgumentNullException

dictionary is null.

ArgumentException

dictionary contains one or more duplicate keys.

Every key in a Dictionary<TKey, TValue> must be unique according to the default equality comparer; likewise, every key in the source dictionary must also be unique according to the default equality comparer.

The initial capacity of the new Dictionary<TKey, TValue> is large enough to contain all the elements in dictionary.

Dictionary<TKey, TValue> requires an equality implementation to determine whether keys are equal. This constructor uses the default generic equality comparer, EqualityComparer<T>.Default. If type TKey implements the System.IEquatable<T> generic interface, the default equality comparer uses that implementation. Alternatively, you can specify an implementation of the IEqualityComparer<T> generic interface by using a constructor that accepts a comparer parameter.

This constructor is an O(n) operation, where n is the number of elements in dictionary.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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