Parameters

key

The object to use as the key of the entry to add.

value

The object to use as the value of the entry to add.

Exceptions

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

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.

Requirements

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