fix: add checks for conditional compilation

src/StevanFreeborn.Results/Result.cs

@@ -53,15 +53,23 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when func or errorHandler is null.</exception>
     public static Result<T, TError> Try<T, TError>(Func<T> func, Func<Exception, TError> errorHandler) where TError : IError
     {
-      if (func is null)
-      {
-        throw new ArgumentNullException(nameof(func));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(func);
+      #else
+        if (func is null)
+        {
+          throw new ArgumentNullException(nameof(func));
+        }
+      #endif
 
-      if (errorHandler is null)
-      {
-        throw new ArgumentNullException(nameof(errorHandler));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(errorHandler);
+      #else
+        if (errorHandler is null)
+        {
+          throw new ArgumentNullException(nameof(errorHandler));
+        }
+      #endif
 
       try
       {
@@ -142,10 +150,14 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when mapper is null.</exception>
     public Result<TNew, TError> Map<TNew>(Func<T, TNew> mapper)
     {
-      if (mapper is null)
-      {
-        throw new ArgumentNullException(nameof(mapper));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(mapper);
+      #else
+        if (mapper is null)
+        {
+          throw new ArgumentNullException(nameof(mapper));
+        }
+      #endif
 
       return IsSuccess ? Result.Ok<TNew, TError>(mapper(Value)) : Result.Fail<TNew, TError>(Error);
     }
@@ -158,10 +170,14 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when mapper is null.</exception>
     public Result<T, TNewError> MapError<TNewError>(Func<TError, TNewError> mapper) where TNewError : IError
     {
-      if (mapper is null)
-      {
-        throw new ArgumentNullException(nameof(mapper));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(mapper);
+      #else
+        if (mapper is null)
+        {
+          throw new ArgumentNullException(nameof(mapper));
+        }
+      #endif
 
       return IsFailure ? Result.Fail<T, TNewError>(mapper(Error)) : Result.Ok<T, TNewError>(Value);
     }
@@ -175,10 +191,14 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when binder is null.</exception>
     public Result<TNew, TError> Bind<TNew>(Func<T, Result<TNew, TError>> binder)
     {
-      if (binder is null)
-      {
-        throw new ArgumentNullException(nameof(binder));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(binder);
+      #else
+        if (binder is null)
+        {
+          throw new ArgumentNullException(nameof(binder));
+        }
+      #endif
 
       return IsSuccess ? binder(Value) : Result.Fail<TNew, TError>(Error);
     }
@@ -193,15 +213,23 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when onSuccess or onFailure is null.</exception>
     public TResult Match<TResult>(Func<T, TResult> onSuccess, Func<TError, TResult> onFailure)
     {
-      if (onSuccess is null)
-      {
-        throw new ArgumentNullException(nameof(onSuccess));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(onSuccess);
+      #else
+        if (onSuccess is null)
+        {
+          throw new ArgumentNullException(nameof(onSuccess));
+        }
+      #endif
 
-      if (onFailure is null)
-      {
-        throw new ArgumentNullException(nameof(onFailure));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(onFailure);
+      #else
+        if (onFailure is null)
+        {
+          throw new ArgumentNullException(nameof(onFailure));
+        }
+      #endif
 
       return IsSuccess ? onSuccess(Value) : onFailure(Error);
     }
@@ -214,15 +242,23 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when onSuccess or onFailure is null.</exception>
     public void Match(Action<T> onSuccess, Action<TError> onFailure)
     {
-      if (onSuccess is null)
-      {
-        throw new ArgumentNullException(nameof(onSuccess));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(onSuccess);
+      #else
+        if (onSuccess is null)
+        {
+          throw new ArgumentNullException(nameof(onSuccess));
+        }
+      #endif
 
-      if (onFailure is null)
-      {
-        throw new ArgumentNullException(nameof(onFailure));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(onFailure);
+      #else
+        if (onFailure is null)
+        {
+          throw new ArgumentNullException(nameof(onFailure));
+        }
+      #endif
 
       if (IsSuccess)
       {
@@ -242,10 +278,14 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when action is null.</exception>
     public Result<T, TError> Map(Action<T> action)
     {
-      if (action is null)
-      {
-        throw new ArgumentNullException(nameof(action));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(action);
+      #else
+        if (action is null)
+        {
+          throw new ArgumentNullException(nameof(action));
+        }
+      #endif
 
       if (IsSuccess)
       {
@@ -262,10 +302,14 @@ namespace StevanFreeborn.Results
     /// <exception cref="ArgumentNullException">Thrown when action is null.</exception>
     public Result<T, TError> Map(Action action)
     {
-      if (action is null)
-      {
-        throw new ArgumentNullException(nameof(action));
-      }
+      #if NET6_0_OR_GREATER
+        ArgumentNullException.ThrowIfNull(action);
+      #else
+        if (action is null)
+        {
+          throw new ArgumentNullException(nameof(action));
+        }
+      #endif
 
       if (IsSuccess)
       {