error CS0246: The type or namespace name 'Form1' could not be found - nant

Question

Currently I am developing a NAnt script to build a Windows forms application. After build the NAnt script, I am getting the error as
error CS0246: The type or namespace name 'Form1' could not be found
(are you missing a using directive or an assembly reference? )
BUILD FAILED
C:\Program
Files\NAnt\examples\SampleWindowsApplication\Sample.Build(24,10):
External Program Failed:
C:\Windows\Microsoft.NET\Framework\v3.5\csc.exe (return code was 1)”
Can anyone please advise to resolve this issue?
Please find my code below.
<?xml version="1.0"?>
<project name="SampleWindowsApplication" default="run">
<property name="basename" value="SampleWindowsApplication"/>
<property name="debug" value="true"/>
<target name="clean">
<delete>
<fileset>
<include name="bin/${basename}-??.exe"/>
</fileset>
</delete>
</target>
<target name="build">
<mkdir dir="bin" />
<assemblyfileset id="Sample.assemblies">
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Assemblies\Sam.Grid.Base.dll" />
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Assemblies\Sam.Grid.Windows.dll" />
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Assemblies\Sam.Shared.Base.dll" />
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Assemblies\Sam.Shared.Windows.dll" />
<!--<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Assemblies\System.Windows.Forms.dll" />-->
</assemblyfileset>
<csc target="exe" output="bin/${basename}.exe" debug="${debug}" >
<references refid="Sample.assemblies" />
<resources>
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\licenses.licx"/>
</resources>
<sources>
<include name="C:\Program Files\NAnt\examples\SampleWindowsApplication\SampleWindowsApplication\Program.cs"/>
</sources>
</csc>
</target>
<target name="run" depends="build">
<exec program="bin/${basename}-cs.exe" basedir="."/>
</target>
</project>
Thanks in advance.

Answer 1

This is typically cause when you add a new file to your solution but don't commit them.
Check to make sure that Form1.cs and Form1.Designer.cs have been added to your source control repository. It looks like your project file was added and committed correctly but some source control tools require you to manually add new files before committing them.