private void button1_Click(object sender, EventArgs e)
{
        Ifoo  = foo Foo();

        // Create input parameter for lambda
        ParameterExpression value = Expression.Parameter(typeof(IFoo),
"value");

        // create return statement for lambda
        Expression setupProperty =
Expression.Return(Expression.Label(), Expression.Property(value,
"Bar"), typeof(string));

        // convert expression to lambda (should now be the equivalent
of "v => v.Bar")
        var func = Expression.Lambda<Func<IFoo,
string>>(setupProperty, value);//.Compile();
        //string s = func(foo); // this bit works fine in .Compile()
is included

        var mockFoo = new Mock<IFoo>();

        mockFoo.SetupProperty(func); // exception thrown by moq here,
obviously isn't exactly the same as "v => v.Bar"
        mockFoo.Object.Bar = "Burge+";

On Sep 22, 3:46 pm, Daniel Cazzulino <dan...@cazzulino.com> wrote:

        // Create input parameter for lambda
        ParameterExpression value = Expression.Parameter(typeof(IFoo),
"value");

        // create return statement for lambda
        Expression setupProperty = Expression.Property(value, "Bar");

        // convert expression to lambda (should now be the equivalent
of "v => v.Bar")
        var func = Expression.Lambda<Func<IFoo,
string>>(setupProperty, value);

        var mockFoo = new Mock<IFoo>();
        mockFoo.SetupProperty(func); // this works now
        mockFoo.Object.Bar = "Burge+";

I investigated this by creating an expression from a lambda using the
code below

        Expression<Func<IFoo, string>> setupBar = v => c.Bar;

I then looked at this in the debugger in vs 2010. Expressions have a
"Debug View" that shows a text representation of the expression so it
is possible to add a watch on that or something similar. The above
comes out as

        .Lambda
#Lambda1<System.Func`2[WindowsFormsApplication1.IFoo,System.String]>(Window sFormsApplication1.IFoo
$v) {
          $v.Bar
        }

I looked at this and tried to work out what Expressions would make
this, then created an expression and compared it in the debugger.