Update

Assets/Scripts/Player/CharacterController/vAnimatorParameter.cs

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+using UnityEngine;
+namespace Invector
+{
+    /// <summary>
+    /// This class is useful when you don't make sure if parameter of the Animator exist
+    /// </summary>
+    public class vAnimatorParameter
+    {
+        readonly AnimatorControllerParameter _parameter;
+  
+        public static implicit operator int(vAnimatorParameter a)
+        {
+            if (a.isValid) return a._parameter.nameHash;
+            else
+                return -1;
+        }
+
+        public readonly bool isValid;
+
+        public vAnimatorParameter(Animator animator, string parameter)
+        {
+            if (animator && animator.ContainsParameter(parameter))
+            {
+                _parameter = animator.GetValidParameter(parameter);
+                this.isValid = true;
+            }
+
+            else this.isValid = false;
+        }
+       
+    }
+
+  
+    /// <summary>
+    /// Extencion class for Animator Paramentes
+    /// </summary>
+    public static class vAnimatorParameterHelper
+    {
+        /// <summary>
+        /// Get Animator paramenter
+        /// </summary>
+        /// <param name="animator">Target animator</param>
+        /// <param name="paramenterName">Target animator paramenter</param>
+        /// <returns></returns>
+        public static AnimatorControllerParameter GetValidParameter(this Animator animator, string paramenterName)
+        {
+            if (null == animator)
+            {
+                return null;
+            }
+            return System.Array.Find(animator.parameters, p => p.name.Equals(paramenterName));
+        }
+        public static bool GetValidParameter(this Animator animator,string paramenterName, out AnimatorControllerParameter parameter)
+        {
+            parameter = animator.GetValidParameter(paramenterName);
+            return parameter != null;
+        }
+
+        /// <summary>
+        /// Check if Animator has specific paramenter
+        /// </summary>
+        /// <param name="animator">Target animator</param>
+        /// <param name="paramenterName">Target animator paramenter</param>
+        /// <returns></returns>
+        public static bool ContainsParameter(this Animator animator, string paramenterName)
+        {
+            if (null == animator)
+            {
+                return false;
+            }
+            return System.Array.Exists(animator.parameters,p=>p.name.Equals(paramenterName));
+        }
+        /// <summary>
+        /// Check if Animator has specific paramenter
+        /// </summary>
+        /// <param name="animator">Target animator</param>
+        /// <param name="parameterName">Target animator paramenter</param>
+        /// <param name="parameterType">Target animator paramenter type</param>
+        /// <returns></returns>
+        public static bool ContainsParameter(this Animator animator, string parameterName, AnimatorControllerParameterType parameterType)
+        {
+            if (null == animator)
+            {
+                return false;
+            }
+            return System.Array.Exists(animator.parameters, p => p.name.Equals(parameterName) && p.type.Equals(parameterType)); ;
+        }
+    }
+}