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LinqConnect Express is a powerful application developed closely to the Microsoft LINQ to SQL technology, and supporting SQL Server, Oracle, MySQL, PostgreSQL, and SQLite. LinqConnect Express was created to provide a powerful model designer with complete integration to Visual Studio.
LINQ stands for Language-Integrated Query, which means that data retrieval is no longer a separate language. The LINQ engine allows .NET applications to connect to databases without bothering much about columns and rows. The data you receive is automatically formed as objects ready to use by your business logic.
LINQ to Relational Data may be thought of as an object-relational mapping (ORM) tool. The type-safe LINQ queries get compiled into MSIL on the fly, and the query clauses are translated into SQL and sent to the SQL server for execution. The program is designed to make your data access layer as safer and faster as possible.
Here are some key features of "LinqConnect Express":
· Visual schema modelling
· Model-First approach support
· Database-First approach support
· Predefined templates
· dbMonitor support
· SQL Server support
· Oracle support
· MySQL support
· PostgreSQL support
· SQLite support
· Project size limit
· Free for use
Requirements:
· NET Framework 3.5
· Microsoft Visual Studio
Limitations:
· Does not allow customization of code templates
· Limited to 10 entities in the project
What's New in This Release: [ read full changelog ]
· The bug with enumerating queries that have empty result sets is fixed
· The bug with materializing query results into invalid object properties is fixed
· The query cache bug with distinguishing compiled queries that have nullable parameters is fixed
· The bug with deleting many-to-many links of entity having multiple many-to-many associations is fixed
· The bug in LinqConnect samples is fixed
Entity Developer:
· The behaviour is changed: the warning, related to the missing property setter, is disabled
· The behaviour is changed: for the association, in which the many-side entity hasn't the primary key, the code and the mapping are not generated
· The behaviour is changed: the properties, that correspond autoincrement fields, are generated with a ReadOnly keyword in VB.NET

Via: LinqConnect Express 4.0.45