ArrayList.Add Method (Object)
.NET Framework (current version)
Adds an object to the end of the ArrayList.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
-
Type:
System.Object
The Object to be added to the end of the ArrayList. The value can be null.
Implements
IList.Add(Object)| Exception | Condition |
|---|---|
| NotSupportedException |
ArrayList accepts null as a valid value and allows duplicate elements.
If Count already equals Capacity, the capacity of the ArrayList 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 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.
Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Available since 10
.NET Framework
Available since 1.1
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