You are creating a windows forms application. You are using a typed Dataset that consist of two typed Data table that maintains a parent – child relationship. The parent table is named as dtParent and the child table as dtChild. If you do as
dtAdapter.Fill(dtParent);
dtParent.Item(0).getchildrows();
you get the exception
System.InvalidCastException: Unable to cast object of type ' dtParent Row[]' to type ' dtChild Row[]'.
The dataset.xsd file looks as under
<msdata:Relationship name=" dtParent _ dtChild " msdata:parent=" dtParent " msdata:child="ReqDetail" msdata:parentkey="ID" msdata:childkey="ID" msprop:Generator_UserRelationName=" dtParent _ dtChild " msprop:Generator_RelationVarName="relation dtParent _ dtChild " msprop:Generator_UserChildTable=" dtChild " msprop:Generator_UserParentTable=" dtParent " msprop:Generator_ParentPropName=" dtParent Row" msprop:Ge