Program.cs

dynamic dynamicVariable;
int i = 20;
dynamicVariable = (dynamic)i;
Console.WriteLine(dynamicVariable);

string stringVariable = "Example string.";
dynamicVariable = (dynamic)stringVariable;
Console.WriteLine(dynamicVariable);

DateTime dateTimeVariable = DateTime.Today;
dynamicVariable = (dynamic)dateTimeVariable;
Console.WriteLine(dynamicVariable);

// The expression returns true unless dynamicVariable has the value null. 
if (dynamicVariable is dynamic)
{
    Console.WriteLine("d variable is dynamic");
}

// dynamic and the as operator.
dynamicVariable = i as dynamic;

// throw RuntimeBinderException if the associated object doesn't have the specified method.
// The code is still compiling successfully.
Console.WriteLine(dynamicVariable.ToNow1);