[Ironpython-users] Passing an IronPython function to C#

Doug Blank doug.blank at gmail.com
Fri Mar 16 02:22:12 CET 2012

I am attempting to pass an IronPython function into the following C#
functions, which I import into IronPython:

	public static Func<object> getFunc1(params Func<object> [] functions) {
		return functions[0];
	public static Func<object> getFunc2(IList<Func<object>> functions) {
		return functions[0];
The first works fine:

python>>> Myro.getFunc1(test1)
<System.Func`1[[System.Object, mscorlib, Version=,
Culture=neutral, PublicKeyToken=b77a5c561934e089]] object at
0x000000000000002B [System.Func`1[System.Object]]>

But the second gives the following error:

python>>> Myro.getFunc2([test1])
Traceback (most recent call last):
  File "<string>", line 1, in <module>
TypeError: Unable to cast object of type
'IronPython.Runtime.PythonFunction' to type

What am I missing in the second case that prevents the cast?

Thanks for any pointers,


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