fixes #21 for ScreenCapturePath

Author: anshooarora

ExtentReports/Model/ScreenCapture.cs

@@ -5,13 +5,15 @@ namespace AventStack.ExtentReports.Model
     [Serializable]
     public class ScreenCapture : Media
     {
+        private const string Base64StringDataType = "data:image/png;base64,";
+
         public string Source
         {
             get
             {
                 if (!string.IsNullOrEmpty(Base64String))
                 {
-                    return "<a href='data:image/png;base64," + Base64String + "' data-featherlight='image'><span class='label grey badge white-text text-white'>base64-img</span></a>";
+                    return "<a href='" + Base64StringDataType + Base64String + "' data-featherlight='image'><span class='label grey badge white-text text-white'>base64-img</span></a>";
                 }
 
                 return "<img class='r-img' onerror='this.style.display=\"none\"' data-featherlight='" + Path + "' src='" + Path + "' data-src='" + Path + "'>";
@@ -24,7 +26,7 @@ public string SourceIcon
             {
                 if (!string.IsNullOrEmpty(Base64String))
                 {
-                    return "<a href='data:image/png;base64," + Base64String + "' data-featherlight='image'><span class='label grey badge white-text text-white'>base64-img</span></a>";
+                    return "<a href='" + Base64StringDataType + Base64String + "' data-featherlight='image'><span class='label grey badge white-text text-white'>base64-img</span></a>";
                 }
 
                 return "<a class='r-img' onerror='this.style.display=\"none\"' data-featherlight='" + Path + "' href='" + Path + "' data-src='" + Path + "'>" +
@@ -37,7 +39,7 @@ public string ScreenCapturePath
         {
             get
             {
-                return !string.IsNullOrEmpty(base.Path) ? base.Path : Base64String;
+                return !string.IsNullOrEmpty(base.Path) ? base.Path : Base64StringDataType + Base64String;
             }
         }