add postgres

Azaion.Common/StringExtensions.cs

@@ -0,0 +1,28 @@
+using System.Text;
+
+namespace Azaion.Common;
+
+public static class StringExtensions
+{
+    public static string ToSnakeCase(this string text)
+    {
+        if (string.IsNullOrEmpty(text))
+            return text;
+
+        if (text.Length < 2)
+            return text.ToLowerInvariant();
+
+        var sb = new StringBuilder();
+        sb.Append(char.ToLowerInvariant(text[0]));
+        for (int i = 1; i < text.Length; ++i) {
+            var c = text[i];
+            if(char.IsUpper(c)) {
+                sb.Append('_');
+                sb.Append(char.ToLowerInvariant(c));
+            } else {
+                sb.Append(c);
+            }
+        }
+        return sb.ToString();
+    }
+}