Add missing file

ICSharpCode.Decompiler/Tests/TestCases/Pretty/HelloWorld.il

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+//  Microsoft (R) .NET Framework IL Disassembler.  Version 4.0.30319.17929
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+
+// Metadata version: v4.0.30319
+.assembly extern mscorlib
+{
+  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
+  .ver 4:0:0:0
+}
+.assembly ndx1gr1f
+{
+  .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilationRelaxationsAttribute::.ctor(int32) = ( 01 00 08 00 00 00 00 00 ) 
+  .custom instance void [mscorlib]System.Runtime.CompilerServices.RuntimeCompatibilityAttribute::.ctor() = ( 01 00 01 00 54 02 16 57 72 61 70 4E 6F 6E 45 78   // ....T..WrapNonEx
+                                                                                                             63 65 70 74 69 6F 6E 54 68 72 6F 77 73 01 )       // ceptionThrows.
+  .permissionset reqmin
+             = {[mscorlib]System.Security.Permissions.SecurityPermissionAttribute = {property bool 'SkipVerification' = bool(true)}}
+  .hash algorithm 0x00008004
+  .ver 0:0:0:0
+}
+.module ndx1gr1f.exe
+// MVID: {8005ACF2-3B7B-47F2-8D51-C16AB15E3999}
+.custom instance void [mscorlib]System.Security.UnverifiableCodeAttribute::.ctor() = ( 01 00 00 00 ) 
+.imagebase 0x00400000
+.file alignment 0x00000200
+.stackreserve 0x00100000
+.subsystem 0x0003       // WINDOWS_CUI
+.corflags 0x00000001    //  ILONLY
+// Image base: 0x01140000
+
+
+// =============== CLASS MEMBERS DECLARATION ===================
+
+.class public auto ansi beforefieldinit Pretty.HelloWorld.HelloWorld
+       extends [mscorlib]System.Object
+{
+  .method public hidebysig static void  Main() cil managed
+  {
+    .entrypoint
+    // Code size       13 (0xd)
+    .maxstack  8
+    IL_0000:  nop
+    IL_0001:  ldstr      "Hello World!"
+    IL_0006:  call       void [mscorlib]System.Console::WriteLine(string)
+    IL_000b:  nop
+    IL_000c:  ret
+  } // end of method HelloWorld::Main
+
+  .method public hidebysig specialname rtspecialname 
+          instance void  .ctor() cil managed
+  {
+    // Code size       7 (0x7)
+    .maxstack  8
+    IL_0000:  ldarg.0
+    IL_0001:  call       instance void [mscorlib]System.Object::.ctor()
+    IL_0006:  ret
+  } // end of method HelloWorld::.ctor
+
+} // end of class Pretty.HelloWorld.HelloWorld