I am new to c#....I am learning c# at present...at present...wht i need to do is that

Take a xml schema.....which has two fields namely Name(datatype--string) and age(datatype--int).
Now i have to add 2 textbox in the form and a button.. one textbox is name and another textbox is age...Using this xml schema , create a dataset such that when the progarm is run...we should be able to enter data in the textbox..and when the button in the form is clicked.... the data which is given in the textbox should be added in a new xml file..ie, a xml file with data should be created to the above xml schema..

and also that if same data given earlier is written...it shouldnt accept it..please help me how to do this...

D h o l