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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace IEnumerableTest
{
    class Program
    {
        static void Main(string[] args)
        {
 
            Test.Normaltest(new Base());
            Test.IEnumerableTest(new Base[] { });
 
            Test.Normaltest(new Inheritance());
            Test.IEnumerableTest(new Inheritance[] { });
 
            Test.IEnumerableTest((IEnumerable<Inheritance>)new Inheritance[] { });
 
        }
    }
 
 
    public static class Test
    {
        public static void Normaltest(Base obj) { }
        public static void IEnumerableTest(IEnumerable<Base> obj) { }
 
    }
 
 
    public class Base
    {
 
    }
 
    public class Inheritance : Base
    {
 
    }
 
 
 
}

prog.cs(19,18): error CS1502: The best overloaded method match for `IEnumerableTest.Test.IEnumerableTest(System.Collections.Generic.IEnumerable<IEnumerableTest.Base>)' has some invalid arguments
prog.cs(28,28): (Location of the symbol related to previous error)
prog.cs(19,18): error CS1503: Argument `#1' cannot convert `System.Collections.Generic.IEnumerable<IEnumerableTest.Inheritance>' expression to type `System.Collections.Generic.IEnumerable<IEnumerableTest.Base>'
Compilation failed: 2 error(s), 0 warnings

Standard output is empty