Is there a C# analogue of numeric_limits from C++?

Question

C++ / C#

Actually, subject. For example, in my C++ template function, I could write something like

template<typename T> void fun()
{
    auto x = numeric_limits<T>::max();
}

I want something similar in C#

Answer 1

Numeric types in .Net have static fields MinValue and MaxValue, so your task can be solved by reflection:

public class MyNumeric<T> where T : struct, IComparable<T>, IEquatable<T>, IConvertible
{
  public static readonly T MaxValue = ReadStaticField("MaxValue");
  public static readonly T MinValue = ReadStaticField("MinValue");

  private static T ReadStaticField(string name)
  {
    FieldInfo field = typeof(T).GetField(name, BindingFlags.Public | BindingFlags.Static);
    if (field == null)
    {
      throw new InvalidOperationException("Нечисловой тип: " + typeof(T).Name);
    }
    return (T)field.GetValue(null);
  }
}

Accordingly, use:

Console.WriteLine(MyNumeric<int>.MaxValue);
Console.WriteLine(MyNumeric<float>.MinValue);

Answer 2

Int16.MaxValue
Int16.MinValue
Int.MaxValue
Int.MinValue
Double.Epsilon

In a word ... partially all this is, but apparently not completely.