Left Function in C#

Hello experts,

How do I get Left of something from a string in C#
I have something like this:

string str="ABC_1234";

Now how do I do something like str=Left(str,"_");
I just want ABC form the str.

Pls help
rowmarkAsked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
str.substring(1, str.Find("_") -1 );
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rowmarkAuthor Commented:
"Find" is not there in the string properties.
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
sorry, it's called indexof. as that function is zero-based, it will be written like this:

str.Substring(1, str.IndexOf(@"_") );
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Babycorn-StarfishCommented:
try using the index of method, this will return the index from zero at which the character/string you wish to find is located or will return -1 if not present
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RytmisCommented:
           string Left(string input, string delimiter) {
                  int delimIndex = input.IndexOf(delimiter);
                  if(delimIndex < 0)
                        return "";
                  
                  return input.Substring(0, delimIndex);
            }

Off the top of my hat :)
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