<= Operator (C# Reference) 

All numeric and enumeration types define a "less than or equal" relational operator (<=) that returns true if the first operand is less than or equal to the second, false otherwise.

Remarks

User-defined types can overload the <= operator. For more information, see operator. If <= is overloaded, >= must also be overloaded. Operations on integral types are generally allowed on enumeration.

Example

// cs_operator_less_than_or_equal.cs
using System;
class MainClass
{
    static void Main() 
    {
        Console.WriteLine(1 <= 1.1);
        Console.WriteLine(1.1 <= 1.1);
    }
}

Output

True
True

See Also

Reference

C# Operators
explicit (C# Reference)

Concepts

C# Programming Guide

Other Resources

C# Reference