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PipelineStageDefinitionBuilderGroupTInput, TValue, TOutput Method (ExpressionFuncTInput, TValue, ExpressionFuncIGroupingTValue, TInput, TOutput, ExpressionTranslationOptions)
Creates a $group stage.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.4.1
Syntax
public static PipelineStageDefinition<TInput, TOutput> Group<TInput, TValue, TOutput>(
	Expression<Func<TInput, TValue>> value,
	Expression<Func<IGrouping<TValue, TInput>, TOutput>> group,
	ExpressionTranslationOptions translationOptions = null
)

Parameters

value
Type: System.Linq.ExpressionsExpressionFuncTInput, TValue
The value field.
group
Type: System.Linq.ExpressionsExpressionFuncIGroupingTValue, TInput, TOutput
The group projection.
translationOptions (Optional)
Type: MongoDB.DriverExpressionTranslationOptions
The translation options.

Type Parameters

TInput
The type of the input documents.
TValue
The type of the values.
TOutput
The type of the output documents.

Return Value

Type: PipelineStageDefinitionTInput, TOutput
The stage.
See Also