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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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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