/// <summary>
/// Gets a read-only set.
/// </summary>
/// <param name="value">The set to wrap or return. This must be non-null.</param>
/// <returns>If the original <paramref name="value"/> is already read-only, this method
/// returns it as is. If it is not read-only, this method returns a read-only wrapper around it.</returns>
public static ISet <T> AsReadOnly <T>(this ISet <T> value)
{
Conditions.RequireReference(value, nameof(value));
ISet <T> result = value;
if (result != null && !result.IsReadOnly)
{
result = new ReadOnlySet <T>(value);
}
return(result !);
}
public ReadOnlySetDebugView(ReadOnlySet <T> set)
{
this.set = set ?? throw Exceptions.NewArgumentNullException(nameof(set));
}