C# - WPF tool to add XML snippets to existing XML file at correct position

Hello, I have an existing XML file containing views with the following structure: <ViewsFile> <Categories> <ViewCategory Name="General"> <Views> <View Name="abc"> <StoredProcedure>sp_abc</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> <View Name="xyz"> <StoredProcedure>sp_xyz</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> <ViewCategory Name="Warehouse"> <Views> <View Name="123"> <StoredProcedure>sp_123</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> </Categories> </ViewsFile> Additionally I have a folder containing several XML files, which are snippets with the following structure: Snippet file 1: <ViewCategory Name="Warehouse"> <Views> <View Name="uio"> <StoredProcedure>sp_uio</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> Snippet file 2: <ViewCategory Name="General"> <Views> <View Name="bla"> <StoredProcedure>sp_bla</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> When starting the tool, it should go through the folder of snippets and fill a DataGridView with the name of the view and the DefaultDisplayName. Additionally there should be one more DataGridViewCheckBoxColumn in the DataGridView: - Install? If the user finally clicks a button, the tool should go through all rows in the DataGridView and add those snippets to the original ViewsFile according to the correct category, if not existing in that file yet. So, if the snippet "uio" was checked, at the end the file should look like: <ViewsFile> <Categories> <ViewCategory Name="General"> <Views> <View Name="abc"> <StoredProcedure>sp_abc</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> <View Name="xyz"> <StoredProcedure>sp_xyz</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> <ViewCategory Name="Warehouse"> <Views> <View Name="123"> <StoredProcedure>sp_123</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> <View Name="uio"> <StoredProcedure>sp_uio</StoredProcedure> <DefaultDisplayName>This name appears somewhere</DefaultDisplayName> </View> </Views> </ViewCategory> </Categories> </ViewsFile>