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Common MSBuild project items

In MSBuild, an item is a named reference to one or more files. Items contain metadata such as file names, paths, and version numbers. All project types in Visual Studio have several items in common. These items are defined in the file Microsoft.Build.CommonTypes.xsd.

This article lists all the common project items.

Reference

Represents an assembly (managed) reference in the project.

Item metadata name Description
HintPath Optional string. Relative or absolute path of the assembly.
Name Optional string. The display name of the assembly, for example, "System.Windows.Forms."
FusionName Optional string. Specifies the simple or strong fusion name for the item.

When this attribute is present, it can save time because the assembly file does not have to be opened to obtain the fusion name.
SpecificVersion Optional boolean. Specifies whether only the version in the fusion name should be referenced.
Aliases Optional string. Any aliases for the reference.
Private Optional boolean. Specifies whether the reference should be copied to the output folder. This attribute matches the Copy Local property of the reference that's in the Visual Studio IDE.

COMReference

Represents a COM (unmanaged) component reference in the project. This item applies only to .NET projects.

Item metadata name Description
Name Optional string. The display name of the component.
Guid Required string. A GUID for the component, in the form {12345678-1234-1234-1234-123456781234}.
VersionMajor Required string. The major part of the version number of the component. For example, "5" if the full version number is "5.46."
VersionMinor Required string. The minor part of the version number of the component. For example, "46" if the full version number is "5.46."
EmbedInteropTypes Optional boolean. If true, embed the interop types from this reference directly into your assembly rather than generating an interop DLL.
Lcid Optional string. The LocaleID for the component.
WrapperTool Optional string. The name of the wrapper tool that is used on the component. Values are:

1. primary
2. tlbimp
3. primaryortlbimp
4. aximp
Isolated Optional boolean. Specifies whether the component is a reg-free component.

COMFileReference

Represents a list of type libraries that are passed to the TypeLibFiles parameter of the ResolveComReference target. This item applies only to .NET projects.

Item metadata name Description
WrapperTool Optional string. The name of the wrapper tool that is used on the component. Values are:

1. primary
2. tlbimp
3. primaryortlbimp
4. aximp

NativeReference

Represents a native manifest file or a reference to such a file.

Item metadata name Description
Name Required string. The base name of the manifest file.
HintPath Required string. The relative path of the manifest file.

ProjectReference

Represents a reference to another project. ProjectReference items are transformed into Reference items by the ResolveProjectReferences target, so any valid metadata on a Reference may be valid on ProjectReference, if the transformation process doesn't overwrite it.

Item metadata name Description
Name Optional string. The display name of the reference.
GlobalPropertiesToRemove Optional string[]. Names of properties to remove when building the referenced project, for example RuntimeIdentifier;PackOnBuild. Defaults to empty.
Project Optional string. A GUID for the reference, in the form {12345678-1234-1234-1234-123456781234}.
OutputItemType Optional string. Item type to emit target outputs into. Default is blank. If the Reference metadata is set to "true" (default) then target outputs will become references for the compiler.
ReferenceOutputAssembly Optional boolean. If set to false, does not include the output of the referenced project as a Reference of this project, but still ensures that the other project builds before this one. Defaults to true.
SetConfiguration Optional string. Sets the global property Configuration for the referenced project, for example Configuration=Release.
SetPlatform Optional string. Sets the global property Platform for the referenced project, for example Platform=AnyCPU.
SetTargetFramework Optional string. Sets the global property TargetFramework for the referenced project, for example TargetFramework=netstandard2.0.
SkipGetTargetFrameworkProperties Optional boolean. If true, builds the referenced project without negotiating the most compatible TargetFramework value. Defaults to false.
Targets Optional string[]. Semicolon separated list of targets in the referenced projects that should be built. Default is the value of $(ProjectReferenceBuildTargets) which defaults to empty, indicating the default targets.

Compile

Represents the source files for the compiler.

Item metadata name Description
DependentUpon Optional string. Specifies the file this file depends on to compile correctly.
AutoGen Optional boolean. Indicates whether the file was generated for the project by the Visual Studio integrated development environment (IDE).
Link Optional string. The notational path to be displayed when the file is physically located outside the influence of the project file.
Visible Optional boolean. Indicates whether to display the file in Solution Explorer in Visual Studio.
CopyToOutputDirectory Optional string. Determines whether to copy the file to the output directory. Values are:

1. Never
2. Always
3. PreserveNewest

EmbeddedResource

Represents resources to be embedded in the generated assembly.

Item metadata name Description
DependentUpon Optional string. Specifies the file this file depends on to compile correctly
Generator Required string. The name of any file generator that is run on this item.
LastGenOutput Required string. The name of the file that was created by any file generator that ran on this item.
CustomToolNamespace Required string. The namespace in which any file generator that runs on this item should create code.
Link Optional string. The notational path is displayed if the file is physically located outside the influence of the project.
Visible Optional boolean. Indicates whether to display the file in Solution Explorer in Visual Studio.
CopyToOutputDirectory Optional string. Determines whether to copy the file to the output directory. Values are:

1. Never
2. Always
3. PreserveNewest
LogicalName Required string. The logical name of the embedded resource.

Content

Represents files that are not compiled into the project, but may be embedded or published together with it.

Item metadata name Description
DependentUpon Optional string. Specifies the file this file depends on to compile correctly.
Generator Required string. The name of any file generator that runs on this item.
LastGenOutput Required string. The name of the file that was created by any file generator that was run on this item.
CustomToolNamespace Required string. The namespace in which any file generator that runs on this item should create code.
Link Optional string. The notational path to be displayed if the file is physically located outside the influence of the project.
PublishState Required string. The publish state of the content, either:

- Default
- Included
- Excluded
- DataFile
- Prerequisite
IsAssembly Optional boolean. Specifies whether the file is an assembly.
Visible Optional boolean. Indicates whether to display the file in Solution Explorer in Visual Studio.
CopyToOutputDirectory Optional string. Determines whether to copy the file to the output directory. Values are:

1. Never
2. Always
3. PreserveNewest

None

Represents files that should have no role in the build process.

Item metadata name Description
DependentUpon Optional string. Specifies the file this file depends on to compile correctly.
Generator Required string. The name of any file generator that is run on this item.
LastGenOutput Required string. The name of the file that was created by any file generator that ran on this item.
CustomToolNamespace Required string. The namespace in which any file generator that runs on this item should create code.
Link Optional string. The notational path to be displayed if the file is physically located outside the influence of the project.
Visible Optional boolean. Indicates whether to display the file in Solution Explorer in Visual Studio.
CopyToOutputDirectory Optional string. Determines whether to copy the file to the output directory. Values are:

1. Never
2. Always
3. PreserveNewest

AssemblyMetadata

Represents assembly attributes to be generated as [AssemblyMetadata(key, value)].

Item metadata name Description
Include Becomes the first parameter (the key) in the AssemblyMetadataAttribute attribute constructor.
Value Required string. Becomes the second parameter (the value) in the AssemblyMetadataAttribute attribute constructor.

Note

This item applies to projects using the SDK for .NET 5 (and .NET Core) and later versions.

InternalsVisibleTo

Specifies assemblies to be emitted as [InternalsVisibleTo(..)] assembly attributes.

Item metadata name Description
Include The assembly name.
Key Optional string. The public key of the assembly.

Note

This item applies to projects using the SDK for .NET 5 (and .NET Core) and later versions.

BaseApplicationManifest

Represents the base application manifest for the build, and contains ClickOnce deployment security information.

CodeAnalysisImport

Represents the FxCop project to import.

Import

Represents assemblies whose namespaces should be imported by the Visual Basic compiler.

See also