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GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
OriginalGriff2-Oct-21 2:14
mveOriginalGriff2-Oct-21 2:14 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
Exoskeletor2-Oct-21 3:01
Exoskeletor2-Oct-21 3:01 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
Pete O'Hanlon2-Oct-21 3:51
mvePete O'Hanlon2-Oct-21 3:51 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
OriginalGriff2-Oct-21 3:55
mveOriginalGriff2-Oct-21 3:55 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
Exoskeletor2-Oct-21 3:58
Exoskeletor2-Oct-21 3:58 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
Exoskeletor2-Oct-21 2:58
Exoskeletor2-Oct-21 2:58 
AnswerRe: Can't catch NullReferenceException while explicitly defined for that Pin
Pete O'Hanlon3-Oct-21 20:22
mvePete O'Hanlon3-Oct-21 20:22 
GeneralRe: Can't catch NullReferenceException while explicitly defined for that Pin
Exoskeletor4-Oct-21 0:21
Exoskeletor4-Oct-21 0:21 
Questionhow read file from Open with in C# Pin
Member 1522978130-Sep-21 6:24
Member 1522978130-Sep-21 6:24 
AnswerRe: how read file from Open with in C# Pin
Dave Kreskowiak30-Sep-21 8:08
mveDave Kreskowiak30-Sep-21 8:08 
AnswerRe: how read file from Open with in C# Pin
Luc Pattyn30-Sep-21 8:30
sitebuilderLuc Pattyn30-Sep-21 8:30 
QuestionQuestion About Async Pin
Kevin Marois29-Sep-21 10:21
professionalKevin Marois29-Sep-21 10:21 
AnswerRe: Question About Async Pin
Pete O'Hanlon29-Sep-21 20:22
mvePete O'Hanlon29-Sep-21 20:22 
GeneralRe: Question About Async Pin
Kevin Marois30-Sep-21 4:24
professionalKevin Marois30-Sep-21 4:24 
GeneralRe: Question About Async Pin
Richard Deeming30-Sep-21 4:41
mveRichard Deeming30-Sep-21 4:41 
GeneralRe: Question About Async Pin
Kevin Marois30-Sep-21 4:48
professionalKevin Marois30-Sep-21 4:48 
GeneralRe: Question About Async Pin
Richard Deeming30-Sep-21 5:05
mveRichard Deeming30-Sep-21 5:05 
GeneralRe: Question About Async Pin
Kevin Marois30-Sep-21 5:20
professionalKevin Marois30-Sep-21 5:20 
AnswerRe: Question About Async Pin
Richard Deeming29-Sep-21 21:54
mveRichard Deeming29-Sep-21 21:54 
GeneralRe: Question About Async Pin
Kevin Marois30-Sep-21 4:23
professionalKevin Marois30-Sep-21 4:23 
QuestionMakeGenericType/CreateInstance Object to underlying Type at run-time: why this works is driving me crazy Pin
BillWoodruff28-Sep-21 5:45
professionalBillWoodruff28-Sep-21 5:45 
AnswerRe: MakeGenericType/CreateInstance Object to underlying Type at run-time: why this works is driving me crazy Pin
Richard Deeming28-Sep-21 6:20
mveRichard Deeming28-Sep-21 6:20 
dynamic uses late-binding. Behind the scenes, it will use reflection to find and invoke the appropriate Add method on the run-time type of the object, with a suitable sprinkling of call-site caching to improve performance.

Simon Cooper published a series of blog posts on that topic back in 2012:
Inside the DLR - Callsites - Simple Talk[^]
Inside the DLR - Callsite binders - Simple Talk[^]
Inside the DLR - Invoking methods - Simple Talk[^]

NB: For the generic collections, you can probably avoid the DLR overhead by using the non-generic interfaces instead:
C#
Type unboundType = typeof(Dictionary<,>);
Type[] typeArgs = { typeof(string), typeof(string) };
Type constructedType = generic.MakeGenericType(typeArgs);

IDictionary instance = (IDictionary)Activator.CreateInstance(constructedType);
instance.Add("1", "2");




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GeneralRe: MakeGenericType/CreateInstance Object to underlying Type at run-time: why this works is driving me crazy Pin
BillWoodruff28-Sep-21 9:47
professionalBillWoodruff28-Sep-21 9:47 
AnswerRe: MakeGenericType/CreateInstance Object to underlying Type at run-time: why this works is driving me crazy Pin
OriginalGriff28-Sep-21 6:30
mveOriginalGriff28-Sep-21 6:30 
GeneralRe: MakeGenericType/CreateInstance Object to underlying Type at run-time: why this works is driving me crazy Pin
BillWoodruff28-Sep-21 10:19
professionalBillWoodruff28-Sep-21 10:19 

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