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PipelineDefinitionBuilder.Unwind<TInput, TIntermediate, TOutput> Method (PipelineDefinition<TInput, TIntermediate>, FieldDefinition<TIntermediate>, AggregateUnwindOptions<TOutput>)

Appends an $unwind stage to the pipeline.

Namespace:  MongoDB.Driver
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.21.0+5a9c3311e158910b88195f290e6d4b1b2715d2b2
Syntax
public static PipelineDefinition<TInput, TOutput> Unwind<TInput, TIntermediate, TOutput>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	FieldDefinition<TIntermediate> field,
	AggregateUnwindOptions<TOutput> options = null
)

Parameters

pipeline
Type: MongoDB.Driver.PipelineDefinition<TInput, TIntermediate>
The pipeline.
field
Type: MongoDB.Driver.FieldDefinition<TIntermediate>
The field.
options (Optional)
Type: MongoDB.Driver.AggregateUnwindOptions<TOutput>
The options.

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: PipelineDefinition<TInput, 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 PipelineDefinition<TInput, 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