Q:

How to get all element from div block which contains type=radio?

maybe somebody can help me how to get all elements in Selenium in some block div with type="radio"  - For example:
I have divBlock = By.CssSelector("input[class='Vertical Radio']");
How to get all elements in divBlock and if element in divBlock have type="radio", click on this element?

A:

Hope I understood you correctly: You want to get all child nodes from your div block, and among these you want to click the radio buttons...
here in Java, but I guess you can transform this into C# in a breeze:
you can use xpath to get all child nodes
By divBlock = By.CssSelector("input[class='textboxDate hasDatepicker']");
WebElement divElement = driver.findElement(divBlock);

//xpath to get all direct child nodes use "//" to get all child nodes and child of child nodes
String xpathExpression = "./*";
List<WebElement> elements = driver.findElements(By.xpath(xpathExpression));

for(WebElement element : elements) {
    if(element.getAttribute("type").equals("radio")) {
        element.click();
    }
}

