What'sUP questions

• Find out if column has varchar 20
• Retrieve bool result by using LinQ code
• Use mongo csharp driver with View
• Failure to Install Microsoft.AspNetCore.AppRef
• How to apply useRef() in React TS?
• Remove the popup message after removing the SQL document in SQL Server
• Display Error message in Validationsummary with Ajax
• Definition of Reference table
• Turn value into singular row
• Convert code from VB into C#

What'sUP answers