Visual Basic files for markdig conversion

docs/visual-basic/language-reference/queries/aggregate-clause.md

@@ -1,6 +1,6 @@
 ---
 title: "Aggregate Clause (Visual Basic)"
-ms.date: 07/20/2015
+ms.date: 08/28/2018
 f1_keywords: 
   - "vb.QueryAggregateIn"
   - "vb.QueryAggregate"
@@ -40,41 +40,83 @@ Aggregate element [As type] In collection _
 
  The `Aggregate` clause can begin a query, or it can be included as an additional clause in a query. If the `Aggregate` clause begins a query, the result is a single value that is the result of the aggregate function specified in the `Into` clause. If more than one aggregate function is specified in the `Into` clause, the query returns a single type with a separate property to reference the result of each aggregate function in the `Into` clause. If the `Aggregate` clause is included as an additional clause in a query, the type returned in the query collection will have a separate property to reference the result of each aggregate function in the `Into` clause.  
 
-## Aggregate Functions  
- The following list describes the standard aggregate functions that can be used with the `Aggregate` clause.  
-
-|Function|Description|  
-|---|---|  
-|`All`|Returns `true` if all elements in the collection satisfy a specified condition; otherwise returns `false`. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#5](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_1.vb)]|  
-|`Any`|Returns `true` if any element in the collection satisfies a specified condition; otherwise returns `false`. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#6](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_2.vb)]|  
-|`Average`|Computes the average of all elements in the collection, or computes a supplied expression for all elements in the collection. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#7](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_3.vb)]|  
-|`Count`|Counts the number of elements in the collection. You can supply an optional `Boolean` expression to count only the number of elements in the collection that satisfy a condition. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#8](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_4.vb)]|  
-|`Group`|Refers to query results that are grouped as a result of a `Group By` or `Group Join` clause. The `Group` function is valid only in the `Into` clause of a `Group By` or `Group Join` clause. For more information and examples, see [Group By Clause](../../../visual-basic/language-reference/queries/group-by-clause.md) and [Group Join Clause](../../../visual-basic/language-reference/queries/group-join-clause.md).|  
-|`LongCount`|Counts the number of elements in the collection. You can supply an optional `Boolean` expression to count only the number of elements in the collection that satisfy a condition. Returns the result as a `Long`. For an example, see the `Count` aggregate function.|  
-|`Max`|Computes the maximum value from the collection, or computes a supplied expression for all elements in the collection. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#9](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_5.vb)]|  
-|`Min`|Computes the minimum value from the collection, or computes a supplied expression for all elements in the collection. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#10](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_6.vb)]|  
-|`Sum`|Computes the sum of all elements in the collection, or computes a supplied expression for all elements in the collection. The following is an example:<br /><br /> [!code-vb[VbSimpleQuerySamples#15](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_7.vb)]|  
-
+## Aggregate Functions
+
+The following are the standard aggregate functions that can be used with the `Aggregate` clause.  
+
+### All
+
+Returns `true` if all elements in the collection satisfy a specified condition; otherwise returns `false`. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#5](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_1.vb)]
+
+### Any
+
+Returns `true` if any element in the collection satisfies a specified condition; otherwise returns `false`. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#6](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_2.vb)]
+
+### Average
+
+Computes the average of all elements in the collection, or computes a supplied expression for all elements in the collection. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#7](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_3.vb)]
+
+### Count
+
+Counts the number of elements in the collection. You can supply an optional `Boolean` expression to count only the number of elements in the collection that satisfy a condition. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#8](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_4.vb)]
+
+### Group
+
+Refers to query results that are grouped as a result of a `Group By` or `Group Join` clause. The `Group` function is valid only in the `Into` clause of a `Group By` or `Group Join` clause. For more information and examples, see [Group By Clause](../../../visual-basic/language-reference/queries/group-by-clause.md) and [Group Join Clause](../../../visual-basic/language-reference/queries/group-join-clause.md).
+
+### LongCount
+
+Counts the number of elements in the collection. You can supply an optional `Boolean` expression to count only the number of elements in the collection that satisfy a condition. Returns the result as a `Long`. For an example, see the `Count` aggregate function.
+
+### Max
+
+Computes the maximum value from the collection, or computes a supplied expression for all elements in the collection. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#9](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_5.vb)]
+
+### Min
+
+Computes the minimum value from the collection, or computes a supplied expression for all elements in the collection. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#10](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_6.vb)]
+
+### Sum
+
+Computes the sum of all elements in the collection, or computes a supplied expression for all elements in the collection. The following is an example:
+
+[!code-vb[VbSimpleQuerySamples#15](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_7.vb)]
+
 ## Example  
- The following code example shows how to use the `Aggregate` clause to apply aggregate functions to a query result.  
+
+The following example shows how to use the `Aggregate` clause to apply aggregate functions to a query result.  
 
  [!code-vb[VbSimpleQuerySamples#4](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_8.vb)]  
 
-## Creating User-Defined Aggregate Functions  
+## Creating User-Defined Aggregate Functions
+
  You can include your own custom aggregate functions in a query expression by adding extension methods to the <xref:System.Collections.Generic.IEnumerable%601> type. Your custom method can then perform a calculation or operation on the enumerable collection that has referenced your aggregate function. For more information about extension methods, see [Extension Methods](../../../visual-basic/programming-guide/language-features/procedures/extension-methods.md).  
 
- For example, the following code example shows a custom aggregate function that calculates the median value of a collection of numbers. There are two overloads of the `Median` extension method. The first overload accepts, as input, a collection of type `IEnumerable(Of Double)`. If the `Median` aggregate function is called for a query field of type `Double`, this method will be called. The second overload of the `Median` method can be passed any generic type. The generic overload of the `Median` method takes a second parameter that references the `Func(Of T, Double)` lambda expression to project a value for a type (from a collection) as the corresponding value of type `Double`. It then delegates the calculation of the median value to the other overload of the `Median` method. For more information about lambda expressions, see [Lambda Expressions](../../../visual-basic/programming-guide/language-features/procedures/lambda-expressions.md).  
+ For example, the following example shows a custom aggregate function that calculates the median value of a collection of numbers. There are two overloads of the `Median` extension method. The first overload accepts, as input, a collection of type `IEnumerable(Of Double)`. If the `Median` aggregate function is called for a query field of type `Double`, this method will be called. The second overload of the `Median` method can be passed any generic type. The generic overload of the `Median` method takes a second parameter that references the `Func(Of T, Double)` lambda expression to project a value for a type (from a collection) as the corresponding value of type `Double`. It then delegates the calculation of the median value to the other overload of the `Median` method. For more information about lambda expressions, see [Lambda Expressions](../../../visual-basic/programming-guide/language-features/procedures/lambda-expressions.md).  
 
  [!code-vb[VbSimpleQuerySamples#18](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_9.vb)]  
 
- The following code example shows sample queries that call the `Median` aggregate function on a collection of type `Integer`, and a collection of type `Double`. The query that calls the `Median` aggregate function on the collection of type `Double` calls the overload of the `Median` method that accepts, as input, a collection of type `Double`. The query that calls the `Median` aggregate function on the collection of type `Integer` calls the generic overload of the `Median` method.  
+ The following example shows sample queries that call the `Median` aggregate function on a collection of type `Integer`, and a collection of type `Double`. The query that calls the `Median` aggregate function on the collection of type `Double` calls the overload of the `Median` method that accepts, as input, a collection of type `Double`. The query that calls the `Median` aggregate function on the collection of type `Integer` calls the generic overload of the `Median` method.  
 
  [!code-vb[VbSimpleQuerySamples#19](../../../visual-basic/language-reference/queries/codesnippet/VisualBasic/aggregate-clause_10.vb)]  
 
-## See Also  
- [Introduction to LINQ in Visual Basic](../../../visual-basic/programming-guide/language-features/linq/introduction-to-linq.md)  
- [Queries](../../../visual-basic/language-reference/queries/index.md)  
- [Select Clause](../../../visual-basic/language-reference/queries/select-clause.md)  
- [From Clause](../../../visual-basic/language-reference/queries/from-clause.md)  
- [Where Clause](../../../visual-basic/language-reference/queries/where-clause.md)  
- [Group By Clause](../../../visual-basic/language-reference/queries/group-by-clause.md)
+## See Also
+
+- [Introduction to LINQ in Visual Basic](../../../visual-basic/programming-guide/language-features/linq/introduction-to-linq.md)  
+- [Queries](../../../visual-basic/language-reference/queries/index.md)  
+- [Select Clause](../../../visual-basic/language-reference/queries/select-clause.md)  
+- [From Clause](../../../visual-basic/language-reference/queries/from-clause.md)  
+- [Where Clause](../../../visual-basic/language-reference/queries/where-clause.md)  
+- [Group By Clause](../../../visual-basic/language-reference/queries/group-by-clause.md)