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PipelineDefinitionBuilderUnwindTInput, TIntermediate Method (PipelineDefinitionTInput, TIntermediate, ExpressionFuncTIntermediate, Object, AggregateUnwindOptionsBsonDocument)
Appends an unwind stage to the pipeline.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.4.1
Syntax
public static PipelineDefinition<TInput, BsonDocument> Unwind<TInput, TIntermediate>(
	this PipelineDefinition<TInput, TIntermediate> pipeline,
	Expression<Func<TIntermediate, Object>> field,
	AggregateUnwindOptions<BsonDocument> options = null
)

Parameters

pipeline
Type: MongoDB.DriverPipelineDefinitionTInput, TIntermediate
The pipeline.
field
Type: System.Linq.ExpressionsExpressionFuncTIntermediate, Object
The field to unwind.
options (Optional)
Type: MongoDB.DriverAggregateUnwindOptionsBsonDocument
The options.

Type Parameters

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

Return Value

Type: PipelineDefinitionTInput, BsonDocument
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 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