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

Modified skeet's and arviman's solution utilizing Generics, Reflection, and C# v6.0.

private static readonly HashSet m_numTypes = new HashSet
{
    typeof(int),  typeof(double),  typeof(decimal),
    typeof(long), typeof(short),   typeof(sbyte),
    typeof(byte), typeof(ulong),   typeof(ushort),
    typeof(uint), typeof(float),   typeof(BigInteger)
};

Followed By:

public static bool IsNumeric( this T myType )
{
    var IsNumeric = false;

    if( myType != null )
    {
        IsNumeric = m_numTypes.Contains( myType.GetType() );
    }

    return IsNumeric;
}

Usage for (T item):

if ( item.IsNumeric() ) {}

null returns false.