910428 - a field in DataGridView control auto-decrements

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C#

hi
i've a data grid view control bound to an mdb file. the first field is id. i've not made the mdb file. when in program i see that whenever i come to create a new row the id gets -1. if i leave it and go to another row indicating i'm not going to add a new row and return to it (last row) the field gets -2. when i repeatedly do this i see that the value gets decremented each time.

at first the mdb file has two rows with ids 1 and 2. if it's defined as an auto-increment field, it must be initialized with 3 each time, not to decrement each time.

since this is my first try with data grid view, please inform me about this behavior and how can i fix this?

thx