How to change the value of associated field

Question

I have 2 classes with a LINQ association between them i.e.:

Table1:       Table2:
ID            ID
Name          Description
              ForiegnID
<         


        

Answer 1

Table1:       Table2:
ID            ID
Name          Description
              ForeignID

With this :

Table2.ForeignID = 2

you receive an error..........

Example :

You can change ForeignID field in Table 2 whit this :

   Table2 table = dataContext.Table2.single(d => d.ID == Id)

   table.Table1 = dataContext.Table1.single(d => d.ID == newId);

Where the variable newId is the id of the record in Table 2 that would you like associate whit the record in Table 1