Fix folding of local functions, if "Fold all braces" is disabled.

Author: siegfriedpammer

ICSharpCode.Decompiler/Output/TextTokenWriter.cs

@@ -22,12 +22,12 @@
 
 using ICSharpCode.Decompiler.CSharp;
 using ICSharpCode.Decompiler.CSharp.OutputVisitor;
-using ICSharpCode.Decompiler.CSharp.Resolver;
 using ICSharpCode.Decompiler.CSharp.Syntax;
 using ICSharpCode.Decompiler.IL;
 using ICSharpCode.Decompiler.Semantics;
 using ICSharpCode.Decompiler.TypeSystem;
 using ICSharpCode.Decompiler.TypeSystem.Implementation;
+using ICSharpCode.Decompiler.Util;
 
 namespace ICSharpCode.Decompiler
 {
@@ -255,7 +255,7 @@ public override void WriteToken(Role role, string token)
 					}
 					if (braceLevelWithinType >= 0 || nodeStack.Peek() is TypeDeclaration)
 						braceLevelWithinType++;
-					if (nodeStack.OfType<BlockStatement>().Count() <= 1 || settings.FoldBraces)
+					if (nodeStack.PeekOrDefault() is TypeDeclaration or BlockStatement { Parent: EntityDeclaration or LocalFunctionDeclarationStatement or AnonymousMethodExpression or LambdaExpression } || settings.FoldBraces)
 					{
 						output.MarkFoldStart(defaultCollapsed: !settings.ExpandMemberDefinitions && braceLevelWithinType == 1, isDefinition: braceLevelWithinType == 1);
 					}
@@ -265,7 +265,7 @@ public override void WriteToken(Role role, string token)
 					output.Write('}');
 					if (role != Roles.RBrace)
 						break;
-					if (nodeStack.OfType<BlockStatement>().Count() <= 1 || settings.FoldBraces)
+					if (nodeStack.PeekOrDefault() is TypeDeclaration or BlockStatement { Parent: EntityDeclaration or LocalFunctionDeclarationStatement or AnonymousMethodExpression or LambdaExpression } || settings.FoldBraces)
 						output.MarkFoldEnd();
 					if (braceLevelWithinType >= 0)
 						braceLevelWithinType--;