Parameters

key

The object to use as the key of the entry to add. [Edit]

value

The object to use as the value of the entry to add. [Edit]

Exceptions

Type	Reason
ArgumentNullException	key is null. [Edit]
ArgumentException	An entry with the same key already exists in the current instance. [Edit]
NotSupportedException	The current instance is read-only or has a fixed size. [Edit]

Remarks

If the specified key already exists in the current instance, this method throws a ArgumentException exception but does not modify the associated value.

Operation

As described above.

[Edit]

Requirements

Namespace: System.Collections
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0