Question

 private Result Execute(
     out T returnValue, 
     string storedProcedureName, 
     Hashtable parameters, 
     ExecuteType executeType) 
   where T : class

What does the following error mean, and how can I fix it?

Error at where :Constrains are not allowed at non-generic declaration

Answer 1

private Result Execute<T>(
                           out T returnValue, 
                           string storedProcedureName, 
                           Hashtable parameters, 
                           ExecuteType executeType
                         ) where T : class

Note the required <T> after Execute.