ReadOnlyCollection<T>.IList.Add(Object) Method

Definition

Adds an item to the IList. This implementation always throws NotSupportedException.

int IList.Add (object value);

Parameters

value
Object

The Object to add to the IList.

Returns

The position into which the new element was inserted.

Implements

Exceptions

Always thrown.

Remarks

This member is an explicit interface member implementation. It can be used only when the ReadOnlyCollection<T> instance is cast to an IList interface.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP 10.0