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c# - typeof: how to get type from string

I've many objects, each of which I have information in string about its type.
like:

string stringObjectType = "DateTime";

While running, I have no object itself.
So I can not test it typeof (object)

How can I get while running the type of the object by:

typeof (stringObjectType)
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try
{
    // Get the type of a specified class.
    Type myType1 = Type.GetType("System.DateTime");
    Console.WriteLine("The full name is {myType1.FullName}.");

    // Since NoneSuch does not exist in this assembly, GetType throws a TypeLoadException.
    Type myType2 = Type.GetType("NoneSuch", true);
    Console.WriteLine("The full name is {myType2.FullName}.");
}
catch(TypeLoadException e)
{
    Console.WriteLine(e.Message);
}
catch(Exception e)
{
    Console.WriteLine(e.Message);
}

See Type.GetType(string) on MSDN


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