Slight code tweaks to make the code compatible with .NET Framework in the AWS Toolkit for VS

Author: normj

src/Amazon.Common.DotNetCli.Tools/Options/CommandLineParser.cs

@@ -63,7 +63,7 @@ public static CommandOptions ParseArguments(
 
                             // --msbuild-parameters is a special case where multiple parameters separated by space character are enclosed in double quotes. In certain environments (like JavaScript action runner), the leading and trailing double quotes characters are also passed to .NET command arguments.
                             if (option == CommonDefinedCommandOptions.ARGUMENT_MSBUILD_PARAMETERS && !string.IsNullOrEmpty(value.StringValue) 
-                                && (value.StringValue.Trim().StartsWith('\"') && value.StringValue.Trim().EndsWith('\"')))
+                                && (value.StringValue.Trim().StartsWith("\"") && value.StringValue.Trim().EndsWith("\"")))
                             {
                                 value.StringValue = value.StringValue.Trim().Trim('\"');
                             }

src/Amazon.Common.DotNetCli.Tools/Utilities.cs

@@ -223,7 +223,7 @@ public static Dictionary<string, string> LookupProjectProperties(string projectL
                 "msbuild",
                 projectFile,
                 "-nologo",
-                $"--getProperty:{string.Join(',', propertyNames)}"
+                $"--getProperty:{string.Join(",", propertyNames)}"
             };
 
             if (!string.IsNullOrEmpty(msBuildParameters))