Mono: Make sure the generated RootNamespace is a valid identifier

1 files changed, 4 insertions, 1 deletions

diff --git a/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs b/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs
index 9135006172..89279c69a6 100644
--- a/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs
+++ b/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs
@@ -140,6 +140,9 @@ namespace GodotSharpTools.Project
 
         public static ProjectRootElement CreateLibraryProject(string name, out ProjectPropertyGroupElement mainGroup)
         {
+            if (string.IsNullOrEmpty(name))
+                throw new ArgumentException($"{nameof(name)} cannot be empty", nameof(name));
+
             var root = ProjectRootElement.Create();
             root.DefaultTargets = "Build";
 
@@ -149,7 +152,7 @@ namespace GodotSharpTools.Project
             mainGroup.AddProperty("ProjectGuid", "{" + Guid.NewGuid().ToString().ToUpper() + "}");
             mainGroup.AddProperty("OutputType", "Library");
             mainGroup.AddProperty("OutputPath", Path.Combine("bin", "$(Configuration)"));
-            mainGroup.AddProperty("RootNamespace", name);
+            mainGroup.AddProperty("RootNamespace", IdentifierUtils.SanitizeQualifiedIdentifier(name, allowEmptyIdentifiers: true));
             mainGroup.AddProperty("AssemblyName", name);
             mainGroup.AddProperty("TargetFrameworkVersion", "v4.5");