NameValueCollection.Add Method (NameValueCollection)
Copies the entries in the specified NameValueCollection to the current NameValueCollection.
Namespace: System.Collections.Specialized
Assembly: System (in System.dll)
Parameters
- c
- Type: System.Collections.Specialized.NameValueCollection
The NameValueCollection to copy to the current NameValueCollection.
| Exception | Condition |
|---|---|
| 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.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
