如何使用泛型类型的运算符

Question

I want to make some generic methods like this one

public static T maxValue(T value1, T value2 )       
{
    if(value1>value2)
        return value1;
    else
       return value2;    
}

And use it like

max<string>.maxValue("john","john");

My question is what should be the return type of the maxValue function and how to use operators like + , = , < , > etc with generic types?

I know that T has no defined data type. I need the improvement this code.

Answer 1

You can do this. This, you can use for comparisons like == , > , < etc., but not for operations like + , - .

Here, we are using for > (return type would be T, same as input types)

public static T maxValue<T>(T value1, T value2) where T : IComparable<T>
{
    if (value1.CompareTo(value2) > 0)
        return value1;
    else
        return value2;
}

Usage

var maxInt = maxValue(3, 7); //=> 7
var maxDouble = maxValue(34.89d, -9.6d); //=> 34.89