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Compiler Warning (level 2) CS0467

Ambiguity between method 'method' and non-method 'non-method'. Using method group.

Inherited members from different interfaces that have the same signature cause an ambiguity error.

The following example generates CS0467.

// CS0467.cs
interface IList 
{
    int Count { get; set; }
}

interface ICounter
{
    void Count(int i);
}

interface IListCounter : IList, ICounter {}

class Driver 
{
    void Test(IListCounter x)
    {
        // The following line causes the warning. The assignment also
        // causes an error because you can't assign a value to a method.
        x.Count = 1;
        x.Count(3);   
        // To resolve the warning, you can change the name of the method or 
        // the property.

        // You also can disambiguate by specifying IList or ICounter.
        ((IList)x).Count = 1;
        ((ICounter)x).Count(3);
    }
    
    static void Main() 
    {
    }
}
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