<<= Operator (C# Reference) 

The left-shift assignment operator.

Remarks

An expression of the form

x <<= y

is evaluated as

x = x << y

except that x is only evaluated once. The << operator shifts x left by the number of bits specified by y.

The <<= operator cannot be overloaded directly, but user-defined types can overload the << operator (see operator).

Example

// cs_operator_left_shift_assignment.cs
using System;
class MainClass
{
    static void Main() 
    {
        int a = 1000;
        a <<= 4;
        Console.WriteLine(a);
    }
}

Output

16000

See Also

Reference

C# Operators

Concepts

C# Programming Guide

Other Resources

C# Reference