Variable names with the same name as the @ definition and the default identifier in C #

We can use @ to go up a notation with the same name as the C # built-in marker.

Like what

string " string " ; Console.WriteLine (@string); string " Test " ; Console.WriteLine (test); string " test1 " ; Console.WriteLine (_test1);

Here is the IL code to see the difference

. Method Private HidebysigStaticvoidMain (string[] args)CIL managed{  . EntryPoint  //Code Size (0x5b)  . Maxstack  2  . Locals Init([0]strings, [1] string 'string' ,           [2]string test, [3]string _test1, [4]string[] cs$6$0000,           [5]Int32cs$7$0001,           [6]BOOLcs$4$0002)  il_0000:  NOP  il_0001:  NOP  il_0002:  ldarg.0  il_0003:  Stloc.scs$6$0000  il_0005:  ldc.i4.0  il_0006:  Stloc.scs$7$0001  il_0008:  BR.Sil_001fil_000a:  Ldloc.scs$6$0000  il_000c:  Ldloc.scs$7$0001  il_000e:  Ldelem.ref  il_000f:  stloc.0  il_0010:  NOP  il_0011:  ldloc.0  il_0012:  Pager       void[mscorlib] System.console::writeline (string)  il_0017:  NOP  il_0018:  NOP  il_0019:  Ldloc.scs$7$0001  il_001b:  ldc.i4.1  il_001c:  Add  il_001d:  Stloc.scs$7$0001  il_001f:  Ldloc.scs$7$0001  il_0021:  Ldloc.scs$6$0000  il_0023:  Ldlen  il_0024:  Conv.i4  il_0025:  CLT  il_0027:  Stloc.scs$4$0002  il_0029:  Ldloc.scs$4$0002  il_002b:  BRTRUE.Sil_000ail_002d:  ldstr      "string"  il_0032:  stloc.1  il_0033:  Ldloc.1  il_0034:  Pager       void[mscorlib] System.console::writeline (string)  il_0039:  NOP  il_003a:  ldstr      "Test"  il_003f:  Stloc.2  il_0040:  Ldloc.2  il_0041:  Pager       void[mscorlib] System.console::writeline (string)  il_0046:  NOP  il_0047:  ldstr      "test1"  il_004c:  stloc.3  il_004d:  Ldloc.3  il_004e:  Pager       void[mscorlib] System.console::writeline (string)  il_0053:  NOP  il_0054:  Pagervaluetype [Mscorlib]system.consolekeyinfo [Mscorlib]system.console::readkey ()il_0059:  Pop  il_005a:  ret} //end of Method Program::main

You can see that in fact, this is only useful for built-in identifiers.

Variable names with the same name as the @ definition and the default identifier in C #