Runs the NAnt build tool.
You can either use an existing build file or nest a build file (snippet) as a child into the task. If you don't specify either, NAnt's default build file search algorithm will apply.
| Attribute | Description | Required | 
| buildfile | External build file to invoke NAnt on. | No. | 
| vm | Same as dotnetexec's vm attribute. Specify the framework to use. | No. | 
| failOnError | Stops the build if NAnt returns with a code indicating an error. | No - defaults to true. | 
| errorProperty | Name of the Ant property to set if NAnt indicated an error. Only useful if the failOnError attribute is set to false. | No. | 
target has a single required attribute name -
    specifies a target to be run.
property has two required attributes.  name and
    value that specify name and value of a property that is to be
    defined in the NAnt invocation.
This element allows no attributes.  You can nest a NAnt build
    file into it and NAnt will be executed on that.  You can also nest
    a build file snippet instead and Ant will wrap the necessary NAnt
    <project> around it.
Let NAnt search for a *.build file in the (Ant) project's base directory and execute the default target in it:
<nant/>
Let NAnt execute the targets named foo and bar in the build
    file nant.build in Ant's basedir and pass the property
    -D:test=testvalue to it:
      <nant buildfile="nant.build">
        <target name="foo"/>
        <target name="bar"/>
        <property name="test" value="testvalue"/>
      </nant>
    
    Define a build file embeded into the task, let NAnt execute the echo target of that build file.
      <nant>
        <target name="echo">
        <build>
          <project basedir="." default="empty">
            <target name="empty"/>
            <target name="echo">
              <echo message="this is NAnt"/>
            </target>
          </project>
        </build>
      </nant>
    
    Run NAnt's echo task:
      <nant>
        <build>
          <echo message="this is NAnt"/>
        </build>
      </nant>
    
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