Fix confusing environment option help text in dotnet run command (#50795)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: baronfel <[email protected]>

Author: Copilot

src/Cli/dotnet/CliStrings.resx

@@ -512,6 +512,18 @@ setx PATH "%PATH%;{0}"
   <data name="CmdEnvironmentVariableDescription" xml:space="preserve">
     <value>Sets the value of an environment variable. 
 Creates the variable if it does not exist, overrides if it does. 
+This argument can be specified multiple times to provide multiple variables.
+
+Examples:
+-e VARIABLE=abc
+-e VARIABLE="value with spaces"
+-e VARIABLE="value;seperated with;semicolons"
+-e VAR1=abc -e VAR2=def -e VAR3=ghi
+</value>
+  </data>
+  <data name="CmdTestEnvironmentVariableDescription" xml:space="preserve">
+    <value>Sets the value of an environment variable. 
+Creates the variable if it does not exist, overrides if it does. 
 This will force the tests to be run in an isolated process. 
 This argument can be specified multiple times to provide multiple variables.
 

src/Cli/dotnet/Commands/Test/TestCommandParser.cs

@@ -278,7 +278,7 @@ private static Command GetVSTestCliCommand()
 
         command.Options.Add(SettingsOption);
         command.Options.Add(ListTestsOption);
-        command.Options.Add(CommonOptions.EnvOption);
+        command.Options.Add(CommonOptions.TestEnvOption);
         command.Options.Add(FilterOption);
         command.Options.Add(AdapterOption);
         command.Options.Add(LoggerOption);

src/Cli/dotnet/Commands/Test/VSTest/TestCommand.cs

@@ -232,7 +232,7 @@ private static TestCommand FromParseResult(ParseResult result, string[] settings
             msbuildPath);
 
         // Apply environment variables provided by the user via --environment (-e) option, if present
-        if (result.GetValue(CommonOptions.EnvOption) is { } environmentVariables)
+        if (result.GetValue(CommonOptions.TestEnvOption) is { } environmentVariables)
         {
             foreach (var (name, value) in environmentVariables)
             {

src/Cli/dotnet/CommonOptions.cs

@@ -338,15 +338,19 @@ public static ForwardedOption<bool> InteractiveOption(bool acceptArgument = fals
         }
         .ForwardIfEnabled([$"--property:SelfContained=false", "--property:_CommandLineDefinedSelfContained=true"]);
 
-    public static readonly Option<IReadOnlyDictionary<string, string>> EnvOption = new("--environment", "-e")
+    public static Option<IReadOnlyDictionary<string, string>> CreateEnvOption(string description) => new("--environment", "-e")
     {
-        Description = CliStrings.CmdEnvironmentVariableDescription,
+        Description = description,
         HelpName = CliStrings.CmdEnvironmentVariableExpression,
         CustomParser = ParseEnvironmentVariables,
         // Can't allow multiple arguments because the separator needs to be parsed as part of the environment variable value.
         AllowMultipleArgumentsPerToken = false
     };
 
+    public static readonly Option<IReadOnlyDictionary<string, string>> EnvOption = CreateEnvOption(CliStrings.CmdEnvironmentVariableDescription);
+    
+    public static readonly Option<IReadOnlyDictionary<string, string>> TestEnvOption = CreateEnvOption(CliStrings.CmdTestEnvironmentVariableDescription);
+
     private static IReadOnlyDictionary<string, string> ParseEnvironmentVariables(ArgumentResult argumentResult)
     {
         var result = new Dictionary<string, string>(