In the First video we are created the Registration form Design and now we are connecting database to our form. if you database connection is lost and you cannot cannot create the file then manually add the file. You can add Database file from here. Or You can add this file from clicking on the app data folder and add SQL Server Database file. Double click on Database.mdf file to open Create Table. Right Click on table and select New query. You can Create Table Graphically You can see your table is created successfully. add SQLDataSource in the bottom of the body. Select Your Database File. You can use this connection string also to connect database. but we are using this Configation Connection String to connect database. Click on test Query to check the connection. now we are creating a onlick event on the Button to Submit data. add the globle namespace files to use sql database commands. Create new SQl Connection. we are store the sql command in the string. make sure the name is correct otherwise you will get error massage. Create new Sql Command. And pass the sql command string to new sql command. and also pass the connectionstring. add the Values parameters names. make sure the name of your values parameters is correct. add textbox name which value is want to be inserted into your table. Use ExecuteNonQuery to Execute Insert, Update and Delete Commands. and at the last close the database connection. Add label to show that you are successfully register. now we are adding validation controls for our Textbox. the first textbox validation is require field Validation. if you add this validation you cannot leave empty textbox. Regular Expression Validator is use to validate user Input. We are using this validation to make sure password is between 3 to 10 Characters. Compare Validator is use to Compare the input value with other input Control. link of part -1 is in the description. you can see the error massage. if you have any question please ask me on the video comment section. you can download this project from the description.