Question

If I use an object initializer when instantiating an object does that objects constructor have access to the initialized properties?

public class ExampleClass {
    public string proptery1 { get; set; }
    public string property2 { get; set; }

    public ExampleClass() {
        if(!string.IsNullOrEmpty(property1)) {
            ...
        }
    }
} 

ExampleClass exampleClass = new ExampleClass() {
    property1 = "hello",
    property2 = "world"
};

Answer 1

No, the constructor is called before any properties are initialized.

Your code:

ExampleClass exampleClass = new ExampleClass() {
    property1 = "hello",
    property2 = "world"
};

is language-sugar for

ExampleClass exampleClass = new ExampleClass();
exampleClass.property1 = "hello";
exampleClass.property2 = "world";