## String Operations

Use `string.IsNullOrWhiteSpace()`
Instead of `string.IsNullOrEmpty()`

Use string interpolation instead concatination
`"%" + searchPolicy.Surname.ToUpper(culture) + "%";`
USE
`$"%{searchPolicy.Surname.ToUpper(culture)}%";`

Use Invariant string operations instead specify culture explicitly
`searchPolicy.Name.ToUpper(culture) => searchPolicy.Surname.ToUpperInvariant()`