C# - how to determine whether a Type is a number

Question

Is there a way to determine whether or not a given .Net Type is a number? For example: System.UInt32/UInt16/Double are all numbers. I want to avoid a long switc

Answer 1

None of the solutions takes Nullable into account.

I modified Jon Skeet's solution a bit:

    private static HashSet NumericTypes = new HashSet
    {
        typeof(int),
        typeof(uint),
        typeof(double),
        typeof(decimal),
        ...
    };

    internal static bool IsNumericType(Type type)
    {
        return NumericTypes.Contains(type) ||
               NumericTypes.Contains(Nullable.GetUnderlyingType(type));
    }

I know I could just add the nullables itself to my HashSet. But this solution avoid the danger of forgetting to add a specific Nullable to your list.

    private static HashSet NumericTypes = new HashSet
    {
        typeof(int),
        typeof(int?),
        ...
    };