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See below method definition.
What is it called in C# where the equals sign is in method parameter.
Does it default method parameter initialization??
public List<Iabc> MyMethod(out List<Ixyz> faces, Type typeXYZ = null, int flag = -1)
{
//...
//...
}
NOTE: Here Iabc and Ixyz are any Interfaces.
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The assignment operator = assigns the value of its right-hand operand to a variable, a property, or an indexer element given by its left-hand operand. The result of an assignment expression is the value assigned to the left-hand operand.
A parameter is the variable listed inside the parentheses in the function definition. An argument is the value that are sent to the function when it is called.
+= Operator. += operator adds the value of the variable on the left with the value on the right, which is (result) then assigned to the variable that is on the left. -= Operator.
They're called optional (or named) arguments. MSDN usually has these things explained pretty well:
Named and Optional Arguments (C# Programming Guide)
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When using named arguments, be aware that changing argument names will break code. (where named parameters are used)
Also, remember that the default value is actually stored in the call site meaning that if you at some later point change the default value, code that is calling the method and was compiled before the change, will still use the old value. it might not matter in all situations but its something to be aware of.
32
That's an optional argument in C# 4.0
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