SQL statement used in C# program wont recognize database "System.Data.SqlClient.SqlException (0x80131904): Showing Invalid object name 'CDA'."

I am developing a basic C# application that will read folder names and insert them into a DB.

However it keeps throwing

System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'CDA'.

(CDA is name of my database)

This is the code in question

 static void InsertSql(Guid folderGuid, string folderName)
        {
            try
            {
                // Build connection string
                SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder
                {
                    DataSource = "WIN10-LAP-HJP",
                    UserID = "sa",
                    Password = "Mypassword123",
                    InitialCatalog = "master"
                };

                // Connect to SQL
                Console.Write("Connecting to SQL Server ... ");
                using (SqlConnection connection = new SqlConnection(builder.ConnectionString))
                {

                    Console.WriteLine("Done.");
                    string query = "INSERT INTO CDA ( FolderName) VALUES (@FolderName )";

                    using (SqlCommand command = new SqlCommand(query, connection))
                    {
                        command.Parameters.Add("@FolderID", SqlDbType.UniqueIdentifier).Value = folderGuid;
                        command.Parameters.Add("@FolderName", SqlDbType.NVarChar ).Value = folderName;



                        connection.Open();
                        var result = command.ExecuteNonQuery();

                        // Check Error
                        if (result < 0)
                            Console.WriteLine("Error inserting data into Database!");
                    }
                }
            }

            catch (SqlException e)
            {
                Console.WriteLine(e.ToString());
            }
        }

This is an image of my mssql

My database connection string seems to work

as I do get

connecting to sql server...Done

And then it throws the error.

You are connecting the entire database and does not specify which table in the database it should use. When considering the information you provided.