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PipelineDefinitionBuilderGroupTInput, TIntermediate, TOutput Method (PipelineDefinitionTInput, TIntermediate, ProjectionDefinitionTIntermediate, TOutput)

Appends a $group stage to the pipeline.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.9.0+32b058abcdf2c7e8d9dd3a676d207b31897eee2e
Syntax
public static PipelineDefinition<TInput, TOutput> Group<TInput, TIntermediate, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	ProjectionDefinition<TIntermediate, TOutput> group
)

Parameters

pipeline
Type: MongoDB.DriverPipelineDefinitionTInput, TIntermediate
The pipeline.
group
Type: MongoDB.DriverProjectionDefinitionTIntermediate, TOutput
The group projection.

Type Parameters

TInput
The type of the input documents.
TIntermediate
The type of the intermediate documents.
TOutput
The type of the output documents.

Return Value

Type: PipelineDefinitionTInput, TOutput
A new pipeline with an additional stage.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type PipelineDefinitionTInput, TIntermediate. 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