Types of operator

1. unary operators
2. binary operators
3. ternary operators

(Docs, 2015)

Unary operators

Operators that take 1 operand. For example,

1. increment operator, ++
2. new operator, new Friend();
3. … etc

Binary operators

Operators that take 2 operands. For example,

1. arithmetic operators
   1. addition, +
   2. subtraction, -
   3. multiplication, *
   4. division, /
   5. modulo, %
2. logical operators
   1. Logical AND, x & y
   2. Logical XOR, x ^ y
   3. Logical OR, x | y
   4. Conditional AND, x && y
   5. Conditional OR, x || y
3. .. etc

Ternary operators

Operators that take 3 operands. The only ternary operator in C# is the conditional operator, ?: (Docs, 2015)

For example, this if-else statement

if (input > 0)
{
    classify = "positive";
}
else
{
    classify = "negative";
}

can be written as

classify = (input > 0) ? "positive" : "negative";

References

1. Docs, M. (2015, July 20). Operators (C# Programming Guide). Retrieved from https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/statements-expressions-operators/operators
2. Docs, M. (2015, July 20). ?: Operator (C# Reference). Retrieved from https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/operators/conditional-operator