Fix build issue

src/Compilers/Core/MSBuildTask/DotnetHost.cs

@@ -32,16 +32,13 @@ public static DotnetHost CreateManagedToolInvocation(string toolName, string com
         {
             var pathToToolOpt = Utilities.GenerateFullPathToTool(toolName);
             // Desktop executes tool directly, only prepend if we're on CLI
-            if (IsCliHost(out string pathToDotnet))
+            if (pathToToolOpt != null && IsCliHost(out string pathToDotnet))
             {
-                if (pathToToolOpt != null)
-                {
-                    commandLineArgs = PrependFileToArgs(pathToToolOpt, commandLineArgs);
-                    pathToToolOpt = pathToDotnet;
-                }
+                commandLineArgs = PrependFileToArgs(pathToToolOpt, commandLineArgs);
+                pathToToolOpt = pathToDotnet;
             }
 
-            return new DotnetHost(toolName, pathToToolOpt, commandLineArgs, isManagedTool: true);
+            return new DotnetHost(pathToToolOpt, commandLineArgs, isManagedTool: true);
         }
 
         private static bool IsCliHost(out string pathToDotnet)

src/Compilers/Core/MSBuildTask/InteractiveCompiler.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System.IO;
 using System.Linq;
 using Microsoft.Build.Framework;
 using Microsoft.Build.Utilities;
@@ -201,7 +202,7 @@ private DotnetHost DotnetHostInfo
                     {
                         // Explicitly provided ToolPath or ToolExe, don't try to
                         // figure anything out
-                        _dotnetHostInfo = DotnetHost.CreateNativeToolInvocation(ToolName, Path.Combine(ToolPath, ToolExe), commandLine);
+                        _dotnetHostInfo = DotnetHost.CreateNativeToolInvocation(Path.Combine(ToolPath, ToolExe), commandLine);
                     }
                 }
                 return _dotnetHostInfo;

src/Compilers/Core/MSBuildTask/ManagedCompiler.cs

@@ -431,7 +431,7 @@ private DotnetHost DotnetHostInfo
                     {
                         // Explicitly provided ToolPath or ToolExe, don't try to
                         // figure anything out
-                        _dotnetHostInfo = DotnetHost.CreateUnmanagedToolInvocation(ToolName, Path.Combine(ToolPath, ToolExe), commandLine);
+                        _dotnetHostInfo = DotnetHost.CreateNativeToolInvocation(Path.Combine(ToolPath, ToolExe), commandLine);
                     }
                 }
                 return _dotnetHostInfo;