Which namespace and assembly contain Length?

Length is in the IronPdf.Editing namespace, shipped in IronPdf.dll.

What is the Length class used for in C#?

Length is the IronPDF class that a value with a specific measurement unit. It is part of the IronPdf.Editing namespace and is used through the IronPDF C# API.

What are the key properties of Length?

Properties commonly used on Length include DPI, Unit, Value. Each property configures one aspect of the PDF editing surface exposed by the class.

How do you create a Length in C#?

Instantiate Length directly with one of its constructors, or obtain it from the relevant IronPDF API entry point. The class supports the standard C# new expression where a constructor is defined.

Class Length

Represents a value with a specific measurement unit.

Inheritance

System.Object

Length

Namespace: IronPdf.Editing

Assembly: IronPdf.dll

Syntax

public class Length : Object

PDF editing in IronPDF is handled through Length. It represents a value with a specific measurement unit.

Length matters when an application needs to configure or invoke PDF editing from C# code. The class encapsulates the related options and behavior in a single object that is set up once and reused across render or processing calls. Typical scenarios include batch generation pipelines, templated document workflows, and integration with existing C# document services.

To use Length, instantiate or obtain it from the relevant entry point in the IronPDF C# API. Key properties include DPI, Unit, Value. Assign options or invoke methods on the instance to configure or perform the operation.

using IronPdf;

// Obtain Length from the relevant entry point in the IronPDF API
void Configure(Length instance)
{
    var current = instance.DPI;
    instance.ToCentimeter();
}

For the broader workflow, see the IronPDF C# documentation for related how-to guides and examples. For broader context, the PDF editing portion of the IronPDF C# API contains related types that work with Length directly. Length exposes additional members beyond those highlighted above; the reference tables on this page list the full set. In application code, treat Length as a configured object that is constructed once and reused across operations rather than instantiated per call. Configuration is generally idempotent: assigning the same property value twice has the same effect as assigning it once. For diagnostic purposes, inspect the relevant Length property after each operation to confirm the configured state. See the constructors, properties, and methods tables below for the complete API surface of Length. Application code typically obtains or instantiates a single Length and shares it across multiple IronPDF operations rather than recreating it per call. For multi-threaded scenarios, follow the threading guidance for the relevant IronPDF entry point; Length instances are not assumed to be thread-safe unless documented.

Constructors

Length(Double, MeasurementUnit, Int32)

Initializes a new instance of the Length class with a specified value and measurement unit.

Declaration

public Length(double value = 0, MeasurementUnit unit, int dpi = 96)

Parameters

Type	Name	Description
System.Double	value	The value of the length in the specified measurement unit. The default value is 0.
MeasurementUnit	unit	The measurement unit of the length. The default value is `MeasurementUnit.Percentage`.
System.Int32	dpi	The DPI of the length. The default value is 96.

Properties

DPI

Gets or sets the DPI of this length.

Declaration

public int DPI { get; set; }

Property Value

Type	Description
System.Int32

Unit

Gets or sets the measurement unit of this length.

Declaration

public MeasurementUnit Unit { get; set; }

Property Value

Type	Description
MeasurementUnit

Value

Gets or sets the value of this length.

Declaration

public double Value { get; set; }

Property Value

Type	Description
System.Double

Methods

ToCentimeter(Nullable<Double>)

Converts the Length value to centimeters.

Declaration

public double ToCentimeter(Nullable<double> refValue = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	refValue	Reference value (cm). Required when Unit is Percentage

Returns

Type	Description
System.Double	The converted value in centimeters.

ToInch(Nullable<Double>)

Converts the Length value to inches.

Declaration

public double ToInch(Nullable<double> refValue = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	refValue	Reference value (inch). Required when Unit is Percentage

Returns

Type	Description
System.Double	The converted value in inches.

ToMillimeter(Nullable<Double>)

Converts the Length value to millimeters.

Declaration

public double ToMillimeter(Nullable<double> refValue = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	refValue	Reference value (mm). Required when Unit is Percentage

Returns

Type	Description
System.Double	The converted value in millimeters.

ToPixel(Nullable<Double>)

Converts the Length value to pixel.

Declaration

public double ToPixel(Nullable<double> refValue = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	refValue	Reference value (pixel). Required when Unit is Percentage

Returns

Type	Description
System.Double	The converted value in pixel.

ToPoints(Nullable<Double>)

Converts the Length value to points.

Declaration

public double ToPoints(Nullable<double> refValue = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	refValue	Reference value (points). Required when Unit is Percentage

Returns

Type	Description
System.Double	The converted value in points.