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GroupByTDocumentKeys Method
Sets one or more key names.

Namespace: MongoDB.Driver.Builders
Assembly: MongoDB.Driver.Legacy (in MongoDB.Driver.Legacy.dll) Version: 2.1.0
Syntax
public static GroupByBuilder<TDocument> Keys(
	params Expression<Func<TDocument, Object>>[] memberExpressions
)

Parameters

memberExpressions
Type: System.Linq.ExpressionsExpressionFuncTDocument, Object
One or more key names.

Return Value

Type: GroupByBuilderTDocument
The builder (so method calls can be chained).
See Also