fix

MyOffice.Core/Attributes/LinkAttribute.cs

@@ -0,0 +1,35 @@
+namespace MyOffice.Core.Attributes;
+
+using System;
+
+[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
+public class LinkAttribute : Attribute
+{
+	public LinkAttribute(Type type)
+	{
+	}
+}
+
+[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
+public class LinkFromAttribute : Attribute
+{
+	public LinkFromAttribute(Type type)
+	{
+	}
+}
+
+[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
+public class LinkToAttribute : Attribute
+{
+	public LinkToAttribute(Type type)
+	{
+	}
+}
+
+[AttributeUsage(AttributeTargets.All, AllowMultiple = true, Inherited = true)]
+public class LinkWithAttribute : Attribute
+{
+	public LinkWithAttribute(Type type)
+	{
+	}
+}

MyOffice.Core/Extensions/StringExtensions.cs

@@ -24,6 +24,26 @@ public static class StringExtensions
 		return str != null && str.Equals(value, StringComparison.OrdinalIgnoreCase);
 	}
 
+	public static string? SafeTrim(this string? str)
+	{
+		return str == null ? str : str!.Trim();
+	}
+
+	public static string? MaxOf(this string? str, int maxLength)
+	{
+		if (str == null)
+		{
+			return null;
+		}
+
+		if (str.Length < maxLength)
+		{
+			return str;
+		}
+
+		return str.Substring(0, maxLength);
+	}
+
 	public static bool AsBool(this string? str, bool defaultValue = false)
 	{
 		return true.ToString().Equals(str, StringComparison.OrdinalIgnoreCase) || defaultValue;
@@ -31,21 +51,11 @@ public static class StringExtensions
 
 	public static Guid AsGuid(this string str)
 	{
-		/*str = str
-			.Replace("_", "/")
-			.Replace("-", "+");
-		byte[] buffer = Convert.FromBase64String(str + "==");
-		return new Guid(buffer);*/
 		return Guid.Parse(str);
 	}
 
 	public static Guid? AsGuidNull(this string str)
 	{
-		/*str = str
-			.Replace("_", "/")
-			.Replace("-", "+");
-		byte[] buffer = Convert.FromBase64String(str + "==");
-		return new Guid(buffer);*/
 		if (Guid.TryParse(str, out var guid))
 		{
 			return guid;