errors/cs0278.cs

   1 // CS0278: `Testing.IMixedEnumerable' contains ambiguous implementation of `enumerable' pattern. Method `System.Collections.IEnumerable.GetEnumerator()' is ambiguous with method `Testing.ICustomEnumerable.GetEnumerator()'
   2 // Line: 28
   3 // Compiler options: -warnaserror -warn:2
   4
   5 using System;
   6 using System.Collections;
   7
   8 namespace Testing {
   9         interface ICustomEnumerable {
  10                 IEnumerator GetEnumerator();
  11         }
  12
  13         interface IMixedEnumerable : IEnumerable, ICustomEnumerable {}
  14
  15         class TestCollection : IMixedEnumerable {
  16                 IEnumerator IEnumerable.GetEnumerator() {
  17                         return null;
  18                 }
  19
  20                 IEnumerator ICustomEnumerable.GetEnumerator()  {
  21                         return null;
  22                 }
  23         }
  24
  25         class Test {
  26                 public static void Main(string[] args) {
  27                         IMixedEnumerable c = new TestCollection();
  28                         foreach(object o in c) {}
  29                 }
  30         }
  31 }