Refer to an instance using a variable

[floydus]

In C# I need to know if it's possible to use a variable (string) as object name.
For example

string myInstanceName = "myObject";
[myInstanceName].callMethod(bla, bla, bla);
[myInstanceName].property = "bla bla 2";

or in a loop do that ...
....

[myInstanceName+i.ToString()].callMethod(bla, bla, bla);

.....

Thanks.