C#

PIEBALDconsult wrote:

If casting works, you might as well do that.

PIEBALDconsult wrote:

Also, why not make the method generic?

blackblizzard wrote:

unnecessary operations

blackblizzard wrote:

How will that help?

blackblizzard wrote:

will be called pretty often

PIEBALDconsult wrote:

That type of casting isn't an operation.

PIEBALDconsult wrote:

The caller won't have to cast the result; it would be done internally.

PIEBALDconsult wrote:

With how many different types of object? If only a few, then maybe write specific cloners for them.

blackblizzard wrote:

depends on whether the type of the object has a copy constructor

PIEBALDconsult wrote:

In many cases (like yours) no conversion is necessary; if I have an instance of class X, but pass it in as Object, and cast it back to X, then there is no conversion -- that's what I meant.

PIEBALDconsult wrote:

I don't think you said that originally, but I see what you mean.

PIEBALDconsult wrote:

I also tested it and see that you are correct; Invoke doesn't seem to behave as documented. Now I'm intrigued...

blackblizzard wrote:

I'd still like to know how to do it without the cast

private static readonly System.Collections.Generic.Dictionary<System.Type,System.Reflection.MethodBase> dic ;

static Test
(
)
{
    dic = new System.Collections.Generic.Dictionary<System.Type,System.Reflection.MethodBase>() ;

    return ;
}

public static T
Clone<T>
(
    this T Source
)
where T : class
{
    System.Type t = typeof(T) ;

    System.Reflection.MethodBase m ;

    if ( !dic.ContainsKey ( t ) )
    {
        System.Type[] part = new System.Type[] { t } ;

        m = t.GetMethod ( "Clone" , part ) ;

        if ( ( m == null ) || ( ((System.Reflection.MethodInfo) m).ReturnType != t ) )
        {
            m = t.GetConstructor ( part ) ;

            if ( m == null )
            {
                throw ( new System.Exception ( "blah blah blah" ) ) ;
            }
        }

        dic [ t ] = m ;
    }
    else
    {
        m = dic [ t ] ;
    }

    T result ;

    if ( m.IsConstructor )
    {
        result = (T) ((System.Reflection.ConstructorInfo) m).Invoke ( new object[] { Source } ) ;
    }
    else
    {
        result = (T) m.Invoke ( Source , new object[] { Source } ) ;
    }

    return ( result ) ;
}

PIEBALDconsult wrote:

An object containing the return value of the invoked method, or nullNothingnullptra null reference (Nothing in Visual Basic) in the case of a constructor."

So I think you have to cast.

System.Diagnostics.ProcessStartInfo info = new System.Diagnostics.ProcessStartInfo(Application.ExecutablePath + "\\Bahrain2030_English.pdf");
info.WindowStyle = System.Diagnostics.ProcessWindowStyle.Maximized;
System.Diagnostics.Process.Start(info);