C#

public class Example
{
    private static object _staticExample; //(1)
    private const object CONSTEXAMPLE = null;  //(2)
    private object normalExamle;


    public void main()
    {
        this.normalExamle = ""; //(3.1)
        normalExamle = ""; //(3.2)
    }
}

System.Windows.Forms.SystemInformation.PrimaryMonitorSize

public class X
    {
    Int32[] a;
    public List<Int32> xxx()
        { ... }
    }

public class Y
    {
    List<Int32> a;
    public List<Int32> xxx()
        { ... }
    }

public class GenericClass<T> where T : IEnumerable
    {
    T a;
    public List</*Type of the elements in the IEnumerable T*/> xxx()
        { .... }
    }