var table_akk=project.Tables["good_iz_file"];
lock(SyncObjects.TableSyncer)
{
for(int i=0; i < table_akk.RowCount; i++)
{
var cells = table_akk.GetRow(i).ToArray();
for(int j=0; j < table_akk.ColCount; j++)
{
if(cells[j].Contains("Вася"))
{
table_akk.SetCell(j,i,cells[j].Replace("Вася","Петя"));
}
}
}
}