Mark parameters as NOT nullable in C#/.NET?

Question

Is there a simple attribute or data contract that I can assign to a function parameter that prevents null from being passed in C#/.NET? Ideally this would also

Answer 1

not the prettiest but:

public static bool ContainsNullParameters(object[] methodParams)
{
     return (from o in methodParams where o == null).Count() > 0;
}

you could get more creative in the ContainsNullParameters method too:

public static bool ContainsNullParameters(Dictionary methodParams, out ArgumentNullException containsNullParameters)
       {
            var nullParams = from o in methodParams
                             where o.Value == null
                             select o;

            bool paramsNull = nullParams.Count() > 0;


            if (paramsNull)
            {
                StringBuilder sb = new StringBuilder();
                foreach (var param in nullParams)
                    sb.Append(param.Key + " is null. ");

                containsNullParameters = new ArgumentNullException(sb.ToString());
            }
            else
                containsNullParameters = null;

            return paramsNull;
        }

of course you could use an interceptor or reflection but these are easy to follow/use with little overhead