How to update LINQ to SQL Class after you changed your data tables? It might be a headache problem if you always use LINQ to SQL.
Because LINQ to SQL is a disconnect architecture, so the normal way is doing update operation in LINQ to SQL Design window by manual:
1: Delete the modified tables from the designer, Click Save to save designer;
2: Refresh the database in Database Explore: Just right click and select refresh;
3: Drag the data table which you modified onto designer, and save designer again;
Above steps always work for us.
Another way is use a tool which provided by Microsoft, this help from StackOverFlow website:
You can use SQLMetal.exe to generate your dbml and or cs/vb file. Use a pre-build script to start it and target the directory where your datacontext project belongs.
C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bin\x64\sqlmetal.exe /server:<SERVER> /database:<database> /code:"path\Solution\DataContextProject\dbContext.cs" /language:csharp /namespace:<your namespace>
However, We have another method:
Do NOT use LINQ to SQL class but use “ADO.NET Entity Data Model”, There is a "refresh" menu item directly in right click menu list on designer, so you do not need to delete old tables and add tables again if you use ADO.NET Entity Data Model.