Referencing assemblies in the U-SQL Catalog
CREATE ASSEMBLY MyDB.OrdersLibAsm FROM @"/DLLs/OrdersLib.dll";
Below is the standard syntax for referencing an assembly that is in the U-SQL catalog.
REFERENCE SYSTEM ASSEMBLY [DBName].[AssemblyName];
Simplifying code with the USING statement
Similar, to C#'s using statement, U-SQL lets you provide an alias for a namespace, this improve the readability of your code.
USING Exc = System.Exceptions;