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C# -- what is "strongly-typed" ?

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Last Modified: 2012-05-07
What does "strongly-typed" mean ?
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Guy Hengel [angelIII / a3]Billing Engineer
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2009

Commented:
it means that this is not allowed by the compiler:
string x = 1; 
while this works:
string x = "1";

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angelIII is correct because in line 1, the value 1 is an integer not a string (the expected data type).
string x = "Hello";
x = "World";
x = 0.00; <-- This line would fail because 0.00 is a double.
 
However,
 
if you do:
x = 0.00.ToString(); <-- This line would work because the value is converted to a string first.

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Gary DavisDir Internet Svcs

Commented:
Well, I think of strongly-typed as being "intellisenseable". A DataTable that is strongly typed can have its fields named instead of indexed (dt.Rows.FirstName instead of dt.Rows["FirstName"]). Also, you can have a typo in the last case but not in the first case (without getting a compile error).
Gary Davis
Top Expert 2009
Commented:
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