Update/correct backend file copyrights

Some of them seemed to be copy-pased from other old files

Author: Rpinski

backend/ILSpyX.Backend.LSP/Handlers/AddAssemblyHandler.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright(c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ILSpyX.Backend.Application;

backend/ILSpyX.Backend.LSP/Handlers/InitWithAssembliesHandler.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright(c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ILSpyX.Backend.Application;

backend/ILSpyX.Backend.LSP/Handlers/RemoveAssemblyHandler.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright(c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ILSpyX.Backend.Application;

backend/ILSpyX.Backend.LSP/Handlers/SearchHandler.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2022 ICSharpCode
+// Copyright(c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ILSpyX.Backend.Application;

backend/ILSpyX.Backend.LSP/ILSpyX.Backend.LSP.csproj

@@ -5,7 +5,7 @@
         <Company>ic#code</Company>
         <Title>ILSpy .NET Decompiler LSP Backend</Title>
         <Product>ILSpy .NET Decompiler</Product>
-        <Copyright>Copyright 2017-2025 ICSharpCode, Microsoft Corporation</Copyright>
+        <Copyright>Copyright (c) ICSharpCode</Copyright>
         <Nullable>enable</Nullable>
     </PropertyGroup>
     <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">

backend/ILSpyX.Backend/Decompiler/DecompilerBackend.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ICSharpCode.Decompiler;

backend/ILSpyX.Backend/Decompiler/TypeSystemExtensions.cs

@@ -1,5 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Copyright(c) 2017 ICSharpCode
+// Copyright (c) ICSharpCode
 // Licensed under the MIT license. See the LICENSE file in the project root for more information.
 
 using ICSharpCode.Decompiler.CSharp.OutputVisitor;

backend/ILSpyX.Backend/ILSpyX.Backend.csproj

@@ -4,7 +4,7 @@
         <Company>ic#code</Company>
         <Title>ILSpy .NET Decompiler X-Platform Backend</Title>
         <Product>ILSpy .NET Decompiler</Product>
-        <Copyright>Copyright 2017-2025 ICSharpCode, Microsoft Corporation</Copyright>
+        <Copyright>Copyright (c) ICSharpCode</Copyright>
         <Nullable>enable</Nullable>
     </PropertyGroup>
     <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">