C# Language Checking equality of generic values.


Example

If logic of generic class or method requires checking equality of values having generic type, use EqualityComparer<TType>.Default property:

public void Foo<TBar>(TBar arg1, TBar arg2)
{
    var comparer = EqualityComparer<TBar>.Default;
    if (comparer.Equals(arg1,arg2)
    {
        ...
    }
}

This approach is better than simply calling Object.Equals() method, because default comparer implementation checks, whether TBar type implements IEquatale<TBar> interface and if yes, calls IEquatable<TBar>.Equals(TBar other) method. This allows to avoid boxing/unboxing of value types.