CODEWITHSUNDEEP
c#lambda
cow
cow

Reputation: 398

lambda func exception ,that maybe is .Net Framework 's bug?

class Program
{
    static void Main(string[] args)
    {
        var t = new TestImpl();
        Console.WriteLine(t.Test(TestEnum.Value));
    }
}

public class AbstractTest<T> where T:new()
{
    public virtual T TestBase(TestEnum v)
    {
        return new T();
    }
}

public class Product
{
    public int Id { get; set; }
}

public enum TestEnum
{
     Value
}
public class TestImpl : AbstractTest<Product>
{
    public int Test(TestEnum ev)
    {
        Func<int> f = () =>
        {
            var result = base.TestBase(ev);
            return result.Id;
        };
        return f();
    }
}

Hi All:

I have a issue like the code (run on the .net4.0).

it will throw exception:An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)

if make " var result = base.TestBase(ev);" chanage to " var result = this.TestBase(ev);" this will normal. if not use lambda func ,use common func like this:

 public class TestImpl : AbstractTest<Product>
{
    public int Test(TestEnum ev)
    {
        Func<int> f = () =>
        {
            //var result = base.TestBase(ev);
           // return result.Id;
            return TestResult(ev);
        };
        return f();
    }

    private int TestResult(TestEnum ev)
    {
        var result = base.TestBase(ev);
        return result.Id;
    }
}

that is ok. i think is "base" or "this" point to different case or other .

Who can tell me why and what's happened? what's the theory? thanks.

Upvotes: 2

Views: 183

Answers (1)

Daniel Hilgarth
Daniel Hilgarth

Reputation: 174309

The error you get normally is a result of a 64 bit application trying to load a 32 bit assembly or vice versa.

However, I could actually reproduce the problem on a machine without .NET 4.5 installed.

The generated IL of the anonymous class seems to be really invalid, because ILSpy even fails to decompile it.

Upvotes: 1

Related Questions