06d25b6f5b
- Added `System.Data` using directive in `EnvelopeCreateReadSQL.cs`. - Updated SQL command strings to use parameter placeholders. - Corrected method name from `CreateParmas` to `CreateParams` and added output parameter `@OutUid`. - Made similar updates in `EnvelopeReceiverAddReadSQL.cs`. - Introduced `ParamsExtensions` class with `ToSqlParam` method for converting .NET objects to SQL-safe parameter strings.