Make the validation against Min/Max value optional as well as the replacing the typed value with the min/max if the typed value is outside of the allowed range.

Currently, the NumericUpDown supports the following two options:

1) The Min/Max possible values are set on the NumericUpDown. This has quite dangerous issue. If the user focus the control, write 4 and press Enter (or click on the OK button), the value is silently and without any warning changed to 100000 and committed.

2) No Min/Max is set on the NumericUpDown. Here, the up/down buttons does not help so much as in the first case. The first up key press sets the value to 1 which is invalid rather than to the first valid value (100000). Almost no-one would like to press 100000 times the Up button to reach the first valid value (I know there is a Page Up button as well but this requires somehow advanced user which know in advance about this feature and it might block other meaningful usage of the Page Up feature).

I would like to see a combination of the two. The NumericUpDown has the Min/Max set but it does not alter the value automatically if not valid.

Examples of the requested behavior:

Scenario 1. The value is null. User presses Up button. The value is set to 100000.

Scenario 2. User enters 4 which is forwarded to the underlying model. User commits the form. The Range(100000, 999999) results in a validation error on the DataForm and the commit is cancelled.

Scenario 3. User enters 4. User presses Up button. Here, there are two possibilities I do not have clear winner up to now. a) The first valid value is set (100000). Cons is that the user might expect change to 5 and does not notice that the value changed to 100000. b) The value is normally incremented to 5, i.e. to an invalid value. 

Available in the 2015 Q3 SP.

The issue is fixed through the UpdateValueToMatchTextOnLostFocus dependency property, introduced in the 2015 Q2 SP1 release.