BuildProperty Class

Note: This class is new in the .NET Framework version 2.0.

Represents a single property in an MSBuild project.

Namespace: Microsoft.Build.BuildEngine
Assembly: Microsoft.Build.Engine (in

public class BuildProperty
public class BuildProperty
public class BuildProperty

The following example creates a Project object and uses the LoadXml method to add content to the project. The BuildProperty, BuildPropertyGroup, and BuildPropertyGroupCollection classes are used to add, remove, and change items in the project.

using System;
using System.Collections.Generic;
using System.Text;

using Microsoft.Build.BuildEngine;

namespace AddNewProperty
    class Program
        /// <summary>
        /// This code demonstrates the use of the following methods:
        ///     Engine constructor
        ///     Project constructor
        ///     Project.LoadFromXml
        ///     Project.Xml
        ///     BuildPropertyGroupCollection.GetEnumerator
        ///     BuildPropertyGroup.GetEnumerator
        ///     BuildProperty.Name (get)
        ///     BuildProperty.Value (set)
        ///     BuildPropertyGroup.RemoveProperty
        ///     BuildPropertyGroup.AddNewProperty
        /// </summary>
        static void Main()
            // Create a new Engine object.
            Engine engine = new Engine(Environment.CurrentDirectory);

            // Create a new Project object.
            Project project = new Project(engine);

            // Load the project with the following XML, which contains
            // two PropertyGroups.
                <Project xmlns=''>




            // Iterate through each PropertyGroup in the Project.  There are two.
            foreach (BuildPropertyGroup pg in project.PropertyGroups)
                BuildProperty propertyToRemove = null;

                // Iterate through each Property in the PropertyGroup.
                foreach (BuildProperty property in pg)
                    // If the property's name is "RemoveThisPropertyPlease", then
                    // store a reference to this property in a local variable,
                    // so we can remove it later.
                    if (property.Name == "RemoveThisPropertyPlease")
                        propertyToRemove = property;

                    // If the property's name is "OutputPath", change its value
                    // from "bin\debug\" to "bin\release\".
                    if (property.Name == "OutputPath")
                        property.Value = @"bin\release\";

                // Remove the property named "RemoveThisPropertyPlease" from the
                // PropertyGroup
                if (propertyToRemove != null)

                // For each PropertyGroup that we found, add to the end of it
                // a new property called "MyNewProperty".
                pg.AddNewProperty("MyNewProperty", "MyNewValue");

            // The project now looks like this:
            //     <?xml version="1.0" encoding="utf-16"?>
            //     <Project xmlns="">
            //       <PropertyGroup>
            //         <Optimize>true</Optimize>
            //         <WarningLevel>4</WarningLevel>
            //         <MyNewProperty>MyNewValue</MyNewProperty>
            //       </PropertyGroup>
            //       <PropertyGroup>
            //         <OutputPath>bin\release</OutputPath>
            //         <MyNewProperty>MyNewValue</MyNewProperty>
            //       </PropertyGroup>
            //     </Project>


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0