NameValueCollection.Add Method (NameValueCollection)
Assembly: System (in System.dll)
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.
Available since 10
Available since 1.1