From a0357012f087b77c23a7f5f67b27162d833f81ee Mon Sep 17 00:00:00 2001
From: "Hamm, Valentin" <Valentin.Hamm@schleupen.de>
Date: Fri, 31 Jan 2025 18:26:47 +0100
Subject: [PATCH] If the renamed type already exists, use a random name.

---
 ILRepack/RepackImporter.cs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ILRepack/RepackImporter.cs b/ILRepack/RepackImporter.cs
index 5f43c1ce..81e28636 100644
--- a/ILRepack/RepackImporter.cs
+++ b/ILRepack/RepackImporter.cs
@@ -169,6 +169,15 @@ public TypeDefinition Import(TypeDefinition type, Collection<TypeDefinition> col
                 // rename the type previously imported.
                 // renaming the new one before import made Cecil throw an exception.
                 string other = GenerateName(nt, originalModule?.Mvid.ToString());
+
+                //Check whether renamed type already exists
+                TypeDefinition otherNt = _repackContext.TargetAssemblyMainModule.GetType(other);
+                if (otherNt != null)
+                {
+                    //Create a random name
+                    other = GenerateName(nt);
+                }
+
                 _logger.Verbose("Renaming " + nt.FullName + " into " + other);
                 nt.Name = other;
                 nt = CreateType(type, col, internalize, null);