c# - Remove everything after the pipe -

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I am trying to remove everything after the pipe but in my code currently he is doing the opposite, it Prior to this the pipe is removing everything. I want to remove everything after the pipe, which has white space. Here I have tried to address the code: drop-down list in the dropdown list as WPC1 = DV_InputForm.FindControl ( "ddl_WPC"); 

  string WPC_Selected = WPC1.SelectedValue; String WPC = Dblupisiaisiakted Sbstring (Dblupisiaiakted. Last Indeksof ( "|") + 1);    
 
 
 you  0  should begin with index pipe sign indicator . 
 
 Substring method. 
 
  string WPC_Selected = "abc | def"; String WPC = Dblupisiaiakted Sbstring (0, Dblupisiaiaktedklistindaks ( "" ")); // abc string WPC1 = WPC_Selected.Substring (0, WPC_Selected.LastIndexOf (" | ") + 1); // ABC |

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