Problems embedding IronPython in C# (Missing Compiler required member 'Microsoft.CSharp.RuntimeBinder.Binder.InvokeMember'

Question

I'm trying to do a simple hello world to test out embedding IronPython within C# but can't seem to resolve this problem..

This is my C# file;

using System; using IronPython.Hosting; using Microsoft.Scripting; using Microsoft.Scripting.Hosting; using System.IO;  public class dynamic_demo {     static void Main()     {         var ipy = Python.CreateRuntime();          dynamic test = ipy.UseFile(@"../../Test.py");          test.Simple();     } } 

And this is the python class;

import sys  def Simple():     print 'Hello from Python'     print "Call Dir(): "     print dir()     print "Print the Path: "      print sys.path 

My target .NET framework is 4.0 and I'm using IronPython 2.6..

I get 2 errors when I run this one is from a file called "CSC"; Error 5 Missing compiler required member

'Microsoft.CSharp.RuntimeBinder.Binder.InvokeMember' C:\Users\Tolga\documents\visual studio 2012\Projects\WindowsFormsApplication1\consoleTest\CSC consoleTest

The other one is from C# file i created

Error 6 One or more types required to compile a dynamic expression cannot be found. Are you missing a reference? C:\Users\Tolga\documents\visual studio 2012\Projects\WindowsFormsApplication1\consoleTest\Program.cs 17 9 consoleTest

Here's the output from the Build

1>------ Build started: Project: consoleTest, Configuration: Debug Any CPU ------ 1>CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.CallSite' is defined in multiple assemblies in the global alias; using definition from 'c:\Program Files (x86)\IronPython 2.6\Microsoft.Scripting.Core.dll' 1>CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.CallSite' is defined in multiple assemblies in the global alias; using definition from 'c:\Program Files (x86)\IronPython 2.6\Microsoft.Scripting.Core.dll' 1>CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.CallSiteBinder' is defined in multiple assemblies in the global alias; using definition from 'c:\Program Files (x86)\IronPython 2.6\Microsoft.Scripting.Core.dll' 1>CSC : warning CS1685: The predefined type 'System.Runtime.CompilerServices.ExtensionAttribute' is defined in multiple assemblies in the global alias; using definition from 'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5\mscorlib.dll' 1>CSC : error CS0656: Missing compiler required member 'Microsoft.CSharp.RuntimeBinder.Binder.InvokeMember' 1>C:\Users\Tolga\documents\visual studio 2012\Projects\WindowsFormsApplication1\consoleTest\Program.cs(17,9,17,20): error CS1969: One or more types required to compile a dynamic expression cannot be found. Are you missing a reference? ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 

Answer 1

You need to add a reference to Microsoft.CSharp.dll. This provides the required types for using dynamic in C#.

Also, you will likely need to upgrade to IronPython 2.7[.3] or later, as there are some incompatibilities with old releases and the newer .NET frameworks.