LINQ is a technology for extracting data using an idiom derived from the C# programming language. While it owes much in functional design to SQL, it is fundamentally its own data …

2015年4月27日 · When this is a linq-to-object call, multiple where clauses will lead to a chain of IEnumerables that read from each other. Using the single-clause form will help performance …

2013年2月1日 · I am trying to convert an old raw Sql query in Linq with Entity Framework here. It was using the IN operator with a collection of items. The query was something like that: …

2010年10月28日 · Linq, as a built-in technology, has performance advantages and disadvantages. The code behind the extension methods has had considerable performance …

2017年4月25日 · Wide range of operators provided by default, and others can easily be added for LINQ to Objects Language features introduced primarily for LINQ are widely applicable …

But LINQ and lambdas are two totally different things, both of which can be used by themselves. Update: As svick rightly points out, LINQ with query syntax is also implemented using lambda …

How can I do group by multiple columns in LINQ? Something similar to this in SQL: SELECT * FROM <TableName> GROUP BY <Column1>,<Column2> How can I convert this to LINQ:

2009年6月6日 · How to make a where in clause similar to one in SQL Server? I made one by myself but can anyone please improve this? public List&lt;State&gt; Wherein(string …

2008年8月14日 · We're working on a Log Viewer. The use will have the option to filter by user, severity, etc. In the Sql days I'd add to the query string, but I want to do it with Linq. How can I …

2016年1月11日 · LINQ Where with AND OR condition Asked 16 years, 2 months ago Modified 6 years, 6 months ago Viewed 200k times