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update description to match code snippet #42856

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4 changes: 2 additions & 2 deletions docs/csharp/linq/standard-query-operators/index.md
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Expand Up @@ -33,11 +33,11 @@ The standard query operators differ in the timing of their execution, depending

## Query operators

In a LINQ query, the first step is to specify the data source. In a LINQ query, the `from` clause comes first in order to introduce the data source (`customers`) and the *range variable* (`cust`).
In a LINQ query, the first step is to specify the data source. In a LINQ query, the `from` clause comes first in order to introduce the data source (`students`) and the *range variable* (`student`).

:::code language="csharp" source="./snippets/standard-query-operators/IndexExamples.cs" id="ObtainDataSource":::

The range variable is like the iteration variable in a `foreach` loop except that no actual iteration occurs in a query expression. When the query is executed, the range variable serves as a reference to each successive element in `customers`. Because the compiler can infer the type of `cust`, you don't have to specify it explicitly. You can introduce more range variables in a `let` clause. For more information, see [let clause](../../language-reference/keywords/let-clause.md).
The range variable is like the iteration variable in a `foreach` loop except that no actual iteration occurs in a query expression. When the query is executed, the range variable serves as a reference to each successive element in `students`. Because the compiler can infer the type of `student`, you don't have to specify it explicitly. You can introduce more range variables in a `let` clause. For more information, see [let clause](../../language-reference/keywords/let-clause.md).

> [!NOTE]
> For non-generic data sources such as <xref:System.Collections.ArrayList>, the range variable must be explicitly typed. For more information, see [How to query an ArrayList with LINQ (C#)](../how-to-query-collections.md) and [from clause](../../language-reference/keywords/from-clause.md).
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