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IAggregateFluentExtensionsGroupTResult, TKey, TNewResult Method (IAggregateFluentTResult, ExpressionFuncTResult, TKey, ExpressionFuncIGroupingTKey, TResult, TNewResult)
Appends a group stage to the pipeline.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.2.0
Syntax
public static IAggregateFluent<TNewResult> Group<TResult, TKey, TNewResult>(
	this IAggregateFluent<TResult> aggregate,
	Expression<Func<TResult, TKey>> id,
	Expression<Func<IGrouping<TKey, TResult>, TNewResult>> group
)

Parameters

aggregate
Type: MongoDB.DriverIAggregateFluentTResult
The aggregate.
id
Type: System.Linq.ExpressionsExpressionFuncTResult, TKey
The id.
group
Type: System.Linq.ExpressionsExpressionFuncIGroupingTKey, TResult, TNewResult
The group projection.

Type Parameters

TResult
The type of the result.
TKey
The type of the key.
TNewResult
The type of the new result.

Return Value

Type: IAggregateFluentTNewResult
The fluent aggregate interface.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAggregateFluentTResult. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).
See Also