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ConstraintCollection.Item Property (Int32)

Gets the Constraint from the collection at the specified index.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

public Constraint this[
	int index
] { get; }


Type: System.Int32

The index of the constraint to return.

Property Value

Type: System.Data.Constraint
The Constraint at the specified index.


The index value is greater than the number of items in the collection.

Use the Contains method to test for the existence of a specific constraint.

The following example gets each Constraint from the ConstraintCollection.

private void GetConstraint(DataTable table)
    for(int i = 0; i < table.Constraints.Count; i++)

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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