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

Basically Skeet's solution but you can reuse it with Nullable types as follows:

public static class TypeHelper
{
    private static readonly HashSet NumericTypes = new HashSet
    {
        typeof(int),  typeof(double),  typeof(decimal),
        typeof(long), typeof(short),   typeof(sbyte),
        typeof(byte), typeof(ulong),   typeof(ushort),  
        typeof(uint), typeof(float)
    };
    
    public static bool IsNumeric(Type myType)
    {
       return NumericTypes.Contains(Nullable.GetUnderlyingType(myType) ?? myType);
    }
}