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Buy and purchase viagra online In .NET we’ve got this cool little language construct called default, buy and purchase viagra online that’ll give you the default value for any given type.  That is, buy and purchase viagra online null, buy and purchase viagra online for any reference type, buy and purchase viagra online or zero/false/DateTime.Min/etc. Buy and purchase viagra online for value types.

Buy and purchase viagra online Here it is in action (nothing amazing going on here):

var x = default(DateTime);

Buy and purchase viagra online So what if you don’t know the type you want the default of at compile time? You can’t say

var y = default(today.GetType());

Buy and purchase viagra online nor

var z = typeof(DateTime).GetDefault();

Buy and purchase viagra online That last one would be nice, buy and purchase viagra online but that “GetDefault” method doesn’t exist.

Buy and purchase viagra online I’ve seen several solutions to this, buy and purchase viagra online that are basically variations on this theme:

public static object GetDefaultValue(Type type)

{

    return type.IsValueType

        ? Activator.CreateInstance(type)

        : null;

}

 

Buy and purchase viagra online This certainly works, buy and purchase viagra online but I somehow feel like it’s not exactly perfect since it doesn’t use the default operator.

Buy and purchase viagra online Here is how I normally do it.  It sidesteps the IsValueType, buy and purchase viagra online and Activator stuff, buy and purchase viagra online and uses the built-in default language construct… First it grabs a handle to the GetDefaultGeneric method, buy and purchase viagra online and then makes the generic version of it with the specific type.  Then it calls it, buy and purchase viagra online returning the value.

public static object GetDefault(this Type type)

{

    var getDefault = typeof(ExtReflection)

                          .GetMethod("GetDefaultGeneric");

    var typed = getDefault.MakeGenericMethod(type);

 

    return typed.Invoke(null, buy and purchase viagra online new object[] { });

}

 

public static T GetDefaultGeneric<T>()

{

    return default(T);

}

 

Buy and purchase viagra online Pretty simple, buy and purchase viagra online but something I’ve found useful every now and again.  I’d guess this technique could be useful in other situations/contexts as well.

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