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NameValueCollection.Add Method (NameValueCollection)

Copies the entries in the specified NameValueCollection to the current NameValueCollection.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

public void Add(
	NameValueCollection c
)

ExceptionCondition
NotSupportedException

The collection is read-only.

ArgumentNullException

c is null.

If a key in c already exists in the target NameValueCollection instance, the associated value in c is added to the existing comma-separated list of values associated with the same key in the target NameValueCollection instance.

If Count already equals the capacity, the capacity of the NameValueCollection is increased by automatically reallocating the internal array, and the existing elements are copied to the new array before the new element is added.

If Count is less than the capacity, this method is an O(1) operation. If the capacity needs to be increased to accommodate the new element, this method becomes an O(n) operation, where n is Count.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.

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