I've no idea what you mean? LINQ is a "Language-Integrated Query" for the C# and VB.NET languages which built upon a number of features in .NET Framework v3.5 t

I've no idea what you mean? LINQ is a "Language-Integrated Query" for the C# and VB.NET languages which built upon a number of features in .NET Framework v3.5 to make possible. It shipped with a "LINQ to Objects", "LINQ to SQL" and a "LINQ to XML" provider. Of the features that differentiates it from querying functionality in other languages is its Expression Trees support that I've highlighted in my last paragraph which is essential for being able to implement alternative LINQ providers.